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How To Fix P20d4 Mercedes-benz 380 | EngineFaultCode.com
P20d4 Mercedes-benz 380 Code Description: … The engine system, in conjuction with the engine control module (ECM)/powertrain control module (PCM), activates the …
Source: p20d4.enginefaultcode.com
Date Published: 2/2/2021
View: 839
P20d4 load limit????? – MBWorld.org Forums
This faultcode was read by a Launch X431 and MD star tester. P20D4 = Load limit active. Who hase info on the source off this problem?
Source: mbworld.org
Date Published: 5/17/2022
View: 1567
P20D4 Code – Exhaust Aftertreatment Fuel Injector ‘B’ Control …
|What are the Possible Causes of the P20D4 Code? · Faulty Exhaust Aftertreatment Fuel Injector · Exhaust Aftertreatment Fuel Injector harness is open or shorted …
Source: www.engine-codes.com
Date Published: 6/5/2022
View: 3386
P20D4 High signal in the control circuit of the fuel injector B of …
Related DTC discussions; Need more help with a P20D4 code? … This may include but is not limited to Mercedes Benz, Sprinter, GMC, …
Source: avtotachki.com
Date Published: 6/9/2021
View: 7292
OBD Diagnostic Trouble Code P20D4 load limit valid.
Search DTC Definition. Search. Submit DTC Request. DTC Code: Manufacturer: Submit. P20D4. Maker: Mercedes-Benz. Description: load limit val.
Source: www.jltechno.com
Date Published: 9/19/2021
View: 9190
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주제에 대한 기사 평가 mercedes-benz dtc p20d4
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P20D4 Exhaust Aftertreatment Fuel Injector B Control Circuit High
P20D4 Exhaust Aftertreatment Fuel Injector B Control Circuit High
OBD-II Trouble Code Technical Description
Stephen Darby
ASE Certified Technician Article byASE Certified Technician
Exhaust Aftertreatment Fuel Injector B Control Circuit High
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code and applies to many OBD-II vehicles (1996-newer). That may include but is not limited to vehicles from Mercedes Benz, Sprinter, GMC, Chevrolet, Ford, etc. Although generic, the exact repair steps may vary depending on year, make, model and powertrain configuration.
If your diesel powered vehicle has stored a code P20D4, it means that the powertrain control module (PCM) has detected excess voltage in the control circuit for the exhaust aftertreatment fuel injector, designated B. The designation B indicates that multiple reductant injectors are in use.
The exhaust aftertreatment system (also called selective catalyst reduction system) is used to enhance the capabilities of the exhaust catalyst system. It may consist of one or more of these items; diesel oxidation catalyst, diesel particulate filter, reductant injection system, ammonia slip catalyst, and a nitrogen oxide (NOx) trap.
Among other things, exhaust aftertreatment systems (EAS) are responsible for the injection of reductant compound/diesel exhaust fluid (DEF) into the exhaust in front of the diesel particulate filter, NOx trap, and/or the catalytic converter via an automated fluid storage and injection system. Introducing DEF into the catalyst system promotes filtration element longevity and allows fewer harmful exhaust emissions to be released into the atmosphere.
The EAS and catalyst systems are monitored and controlled by either the PCM or a stand-alone controller (which interacts with the PCM). The controller monitors the O2, NOx, and exhaust temperature sensors (as well as other inputs) to determine the appropriate time for DEF (reductant) injection. DEF injection must be performed at the appropriate instant and in precise measure in order to maintain an exhaust temperature that is within acceptable parameters and to optimize pollutant filtration.
If the PCM detects excess voltage on the control circuit for the EAS fuel injector, a code P20D4 will be stored and a malfunction indicator lamp may be illuminated.
What is the severity of this DTC?
A stored code P20D4 should be considered severe and addressed as quickly as possible. The EAS system may be damaged as a result of the conditions which contributed to the code P20D4 being stored.
What are some of the symptoms of the code?
Symptoms of a P20D4 trouble code may include:
Diminished engine performance
Excessive black smoke from vehicle exhaust
Reduction in fuel efficiency
Other EAS/SCR related codes
What are some of the common causes of the code?
Causes for this code may include:
Bad EAS fuel injector
Open or shorted circuits in the EAS fuel injection control circuit
Insufficient DEF in the EAS reservoir
Bad EAS controller/PCM or programming error
What are some P20D4 troubleshooting steps?
A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of vehicle specific diagnostic information will be required to diagnose a code P20D4.
Locating a technical service bulletin (TSB) that matches the vehicle year, make, and model; as well as the engine size, code/s stored, and symptoms exhibited, could yield helpful diagnostic information.
I like to begin my diagnosis with a visual inspection of the EAS wiring harnesses and connectors. Burnt or damaged wiring and or connectors should be repaired or replaced before proceeding.
I would continue by plugging the scanner into the vehicle diagnostic connector and retrieving all stored codes and pertinent freeze frame data. Consider writing this information down before clearing the codes. Test drive the vehicle until the PCM either enters readiness mode or the code is reset.
If the PCM enters readiness mode at this time, the code is intermittent and may be much more difficult to diagnose If this is the case, the conditions which contributed to the code being stored may need to worsen before an accurate diagnosis can be made.
If the code is immediately reset, completing the next step of your diagnosis will require that you search your vehicle information source to obtain diagnostic flow charts, connector pin-out charts, connector face views, as well as component testing procedures and specifications. You may also use your vehicle iformation source to pin-point the exact location of EAS fuel injector A.
Use the DVOM to test (voltage drop) the power supply to the EAS control system. Test fuses with the circuit loaded to avoid misdiagnosis. If the appropriate power (battery voltage) and ground circuits are discovered, use the scanner to activate the EAS fuel injector (solenoid) and test output control circuit voltage. If voltage is insufficient, suspect that the controller is bad or has experienced a programming error.
If the voltage output circuit is within parameters, use the DVOM to test the EAS fuel injector in question. If the injector fails to meet manufacturer’s specifications, suspect that it has failed.
The EAS fuel injector is simply a solenoid based injector that sprays reductant fluid into the exhaust
Don’t forget ground circuits when voltage drop testing
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P20d4 Mercedes-benz 380 Engine Fault Code Meaning – P20d4 Mercedes-benz 380 Engine Trouble Code – How To Fix P20d4 Mercedes-benz 380
Engine Code Search P U B C Search engine trouble codes.
Example: P0120
P20d4 Mercedes-benz 380 Engine Fault Code
Check Solution For P20d4 Mercedes-benz 380 OBD Code :
P20d4 Mercedes-benz 380 engine code seems a kind of powertrain problem, we try to show one by one the meaning and the solution.
Brief explanation of the P20d4 Mercedes-benz 380 code and definition of P20d4 Mercedes-benz 380 is the bottom side.
P20d4 Mercedes-benz 380 Meaning :
p Powertrain Code
Problem is related engine, transmission and emissions systems. 2 MFG – Manufacturer Specific 0 Fuel And Air Metering d BBV Sensor Circuit Low Voltage 4 Cruise Vehicle Speed/Set Speed Difference Too High
MFG – Manufacturer Specific codes, which have a ‘1’ as their second digit to indicate they are unique to a particular vehicle make or model. These special codes were deemed necessary by the vehicle manufacturers so they could provide additional diagnostic information beyond the basic list of generic OBD II codes for all kinds of faults, not just emissions-related faults.
How To Fix P20d4 Mercedes-benz 380 ? Regarding the P20d4 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter.
P20d4 Mercedes-benz 380 Code Description:
The engine system, in conjuction with the engine control module (ECM)/powertrain control module (PCM), activates the P20d4 code solenoid valve to control oil pressure to the engine mechanism that is installed in the valve system to switch valve timing between Low and High.If the engine solenoid valve has an open or short circuit, a DTC is stored. When you see P20d4 Mercedes-benz 380 engine fault code on your engine code reader this description will help you.
Final Step: In the definitions listed below, there is a test drive recommended after you’ve completed any repairs to see if the condition is fixed. Before you take a test drive after a repair, always erase the P Code(s) first. This will turn the check engine light off and then you will know if the check engine light returns, you’ve got further diagnostics to complete.
P20d4 load limit?????
P20d4 load limit?????
Car hase this faultcode and will not drive at a constand speed, the engine will continu change its power. The fault code will appear when we use the throtle once.(even when the car is not driving)
change over valve,vacuum valve, map sensor and are new. The throtle housing is clean. The valve´s in the inlet manifold work.
??????????
P20D4: Code Meaning, Causes, Symptoms, & Tech Notes
What does this mean? | What are the Possible Causes of the P20D4 Code? Faulty Exhaust Aftertreatment Fuel Injector
Exhaust Aftertreatment Fuel Injector harness is open or shorted
Exhaust Aftertreatment Fuel Injector circuit poor electrical connection
| How to Fix the P20D4 Code? Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
| What is the cost to diagnose the P20D4 code? Labor: 1.0 The cost to diagnose the P20D4 code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
| What are P20D4 code possible symptoms? Engine Light ON (or Service Engine Soon Warning Light)
| What Does the P20D4 Code Mean? The exhaust fuel addition injector assembly is mounted on the outlet of the turbocharger sub-assembly, and low-pressure fuel is supplied to the exhaust fuel addition injector assembly by the feed pump in the supply pump assembly. The exhaust fuel addition injector assembly adds fuel by a control signal from the Engine Control Module (ECM). This injector is used for two different controls: Particulate Matter (PM) forced regeneration and PM reduction. Exhaust Aftertreatment Fuel Injector ‘B’ Control Circuit High
| Need more information with the P20D4 code? Need more information on how to fix the P20D4 code?
Get Access to Factory Service Manuals
P20D4 High signal level in the control circuit of the fuel injector B of the after-treatment system of exhaust gases
P20D4 High signal in the control circuit of the fuel injector B of the aftertreatment system
OBD-II DTC Datasheet
High signal level in the control circuit of the fuel injector B of the exhaust gas aftertreatment system
What does this mean?
This Diagnostic Trouble Code (DTC) is a generic transmission code and applies to many OBD-II vehicles (1996 and newer). This may include but is not limited to Mercedes Benz, Sprinter, GMC, Chevrolet, Ford, etc. While general, the exact repair steps may vary depending on the model year, make, model and transmission configuration.
If your diesel vehicle has stored the code P20D4, it means that the powertrain control module (PCM) has detected an overvoltage in the aftertreatment fuel injector control circuit designated B. B designation indicates multiple reductant injectors are in use. …
An Exhaust Aftertreatment System (also called a Selective Catalyst Recovery System) is used to enhance the capabilities of the catalytic exhaust gas system. It can consist of one or more of these elements; diesel oxidation catalyst, particulate filter, reducing agent injection system, ammonia slip catalyst and nitrogen oxide (NOx) trap.
Among other things, exhaust gas aftertreatment systems (EAS) are responsible for injecting a reductant / diesel engine fluid (DEF) compound into the exhaust gases upstream of the particulate filter, NOx trap and / or catalytic converter via an automated fluid storage. and injection system. The addition of DEF to the catalytic system extends the life of the filter element and reduces emissions of harmful exhaust gases into the atmosphere.
EAS systems and catalysts are monitored and controlled by either the PCM or a stand-alone controller (which interacts with the PCM). The controller monitors the O2, NOx and exhaust gas temperature sensors (as well as other inputs) to determine the appropriate timing for the DEF (reductant) injection. DEF must be injected at the correct time and to the exact extent to keep the exhaust gas temperature within acceptable parameters and to optimize the filtration of pollutants.
If the PCM detects an overvoltage in the EAS fuel injector control circuit, a P20D4 code will be stored and the malfunction indicator lamp may illuminate.
What is the severity of this DTC?
A stored P20D4 code should be treated as serious and rectified as soon as possible. The EAS system can be damaged as a result of conditions that contributed to the persistence of the P20D4 code.
What are some of the symptoms of the code?
Symptoms of a P20D4 trouble code may include:
Reduced engine performance
Excessive black smoke from vehicle exhaust
Decreased fuel efficiency
Other codes related to EAS / SCR
What are some of the common causes for the code?
Reasons for this code may include:
Defective EAS fuel injector
Open or short circuit in the EAS fuel injection control circuit
Insufficient DEF in the EAS reservoir
Bad EAS / PCM controller or programming error
What are some steps to troubleshoot the P20D4?
Diagnosing a P20D4 code will require a diagnostic scanner, digital volt / ohmmeter (DVOM), and vehicle-specific diagnostic source.
Search for a Technical Service Bulletin (TSB) that matches the year of manufacture, make and model of the vehicle; as well as engine displacement, stored codes, and detected symptoms can provide useful diagnostic information.
I like to start my diagnosis with a visual inspection of the EAS wiring harnesses and connectors. Burnt or damaged wiring and / or connectors must be repaired or replaced before proceeding.
I would proceed by connecting the scanner to the vehicle’s diagnostic connector and retrieving all stored codes and associated freeze frame data. Make a note of this information before clearing codes. Test drive the vehicle until the PCM enters readiness mode or the code is cleared.
If the PCM enters ready mode during this time, the code is intermittent and can be much more difficult to diagnose. If so, the conditions that contributed to the retention of the code may need to worsen before an accurate diagnosis can be made.
If the code is reset immediately, the next diagnostic step will require searching the vehicle information source for diagnostic block diagrams, connector pinouts, connector faces, and component test procedures and specifications. You can also use your vehicle information source to determine the exact location of the A EAS fuel injector.
Use the DVOM to check (voltage drop) the power supply of the EAS control system. Check fuses with a loaded circuit to avoid misdiagnosis. If proper power (battery voltage) and ground circuits are found, use a scanner to activate the EAS fuel injector (solenoid) and check the control circuit output voltage. If the voltage is insufficient, suspect the controller is defective or has a programming error.
If the voltage output circuit is within specifications, use the DVOM to test the EAS fuel injector in question. If the injector does not meet manufacturer’s specifications, suspect that it is out of order.
An EAS fuel injector is simply a solenoid-based injector that sprays reducing fluid into the exhaust pipe.
Do Not Forget Ground Loops When Testing Voltage Drop
Related DTC discussions
There are currently no related topics in our forums. Post a new topic on the forum now.
Need more help with a P20D4 code?
If you still need help with DTC P20D4, post a question in the comments below this article.
NOTE. This information is provided for informational purposes only. It is not intended to be used as a repair recommendation and we are not responsible for any action you take on any vehicle. All information on this site is protected by copyright.
OBD Diagnostic Trouble Code P20D4 load limit valid.
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P20D4 Fault Code Check – P20D4 OBD-II Diagnostic Powertrain (P) Trouble Code
Check P20D4 Fault Code
When you check engine light came on code P20D4 the reason should be . However your vehicle’s manufacturer may have a different definition for the P20D4 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.
Parts or components should not be replaced with reference to only a P20D4 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.
P20D4 Possible Fix :
Generally, coolant loss is the most common cause of overheating. If your engine overheats repeatedly, the high temperature could result in irreparable damage that can be a pain to repair. Prevention is the best medicine, so avoid this kind of damage by making sure the coolant is clean and the cooling system is in good operating condition.
P20D4 OBD-II Diagnostic Powertrain (P) Trouble Code Description P20D4 Exhaust Aftertreatment Fuel Injector B Control Circuit High so you have to check ODB-II Fault Code Check list. Reason For P20D4 Code The reason of P20D4 OBD-II Fault Code Check is P20D4 Exhaust Aftertreatment Fuel Injector B Control Circuit High.
P20D4 Solution:
Disconnected, dirty or fouled spark plugs are common causes for engines that won’t start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.
Code Search Please fill the “Code Box” to find engine fault code. P U B C Example: 0120 Some engine fault codes P2856 Code
P254D Code
P2577 Code
P268D Code
What does fault code P20D4 mean ?
What does a diagnostic reading P20D4 mean ?
How to fix OBD2 Code P20D4 ?
What do we know about P20D4 code ?
How to Clear P20D4 Trouble Code
An OBD 2 scanner is the best and safest way to erase a DTC from your car’s system. This scanner communicates with the car’s computer and instructs the computer to erase the code. It does not change or tweak the settings from inside the car or its systems.
P20D4 Trouble Code Solution: Decoding, Causes, Reset
The P20D4 error code reads “Exhaust Gas Aftertreatment System B Fuel Injector Control Circuit High.” Often, in programs working with an OBD-2 scanner, the name may have the English spelling “Exhaust Aftertreatment Fuel Injector” B “Control Circuit High”.
Datasheet and explanation of the P20D4 code
A stored code P20D4 means that the control module has detected a high signal level in the fuel injector “B” control circuit of the exhaust gas aftertreatment system. A marked “B” nozzle indicates that more than one reductant nozzle is being used.
An Exhaust Gas After Treatment (EAS) system is sometimes referred to as a Selective Catalytic Reduction (SCR) system. Typically the system consists of a catalyst, a particulate filter, a reducing agent injection system and a nitrogen oxides (NOx) trap.
SCR systems inject a reducing agent (urea) into the exhaust before the particulate filter or catalytic converter. A precisely timed injection raises the temperature of the filter element and allows it to operate more efficiently.
This allows the filter element to last longer and emits less harmful exhaust gases into the atmosphere.
The entire SCS system is monitored and controlled by either the PCM or a separate controller that communicates with the PCM. The controller monitors the readings of the O₂, NOx and exhaust gas temperature sensors to determine the appropriate timing for the injection of the reductant.
If the PCM detects excessive voltage in the exhaust gas aftertreatment (EAS) fuel injector control circuit. Code P20D4 will be stored and the malfunction indicator lamp may illuminate.
Malfunction symptoms
The primary driver symptom of a P20D4 error is a MIL (Malfunction Indicator Light) illuminated. It is also called Check engine or simply “check is on”.
They can also manifest as:
The control lamp “Check engine” on the control panel will light up (the code will be written into memory as a malfunction). Other associated trouble codes may also be present. Decreased engine power. Black smoke from the exhaust pipe. Increased fuel consumption. The engine can go into emergency operation.
A stored P20D4 code should be treated as serious and rectified as soon as possible. The SCR system can be disabled, causing damage to the particulate filter and catalytic converter.
Reasons for the error
A P20D4 code may indicate one or more of the following problems have occurred:
EAS fuel injector defective.
Open or short circuit in the control circuit of the exhaust gas aftertreatment system.
Insufficient recovery fluid in tank.
In rare cases, PCM malfunction or programming error.
How to Repair or Reset DTC P20D4
Some suggested steps to troubleshoot and fix the P20D4 error code:
Read all stored data and error codes with an OBD-II scanner. To find out when and under what circumstances the P20D4. Clear the error codes from the computer memory and test drive the vehicle to see if the problem reappears. If the error code reappears, visually inspect the electrical wires and connectors. Visually inspect and test the EAS fuel injector. Repair or replace the EAS fuel injector and any defective wires as necessary. Check the recovery fluid in the tank. If there are no defects, check the PCM and its software.
Diagnostics and problem solving
Before starting the troubleshooting process for your P20D4, you should review the vehicle-specific Technical Service Bulletins (TSB). In some cases, this can save you a lot of time by pointing you in the right direction.
The diagnosis itself must be started with a visual inspection of the harnesses and connectors of the reductant system. Burnt or damaged wiring and connectors must be repaired or replaced before continuing testing.
Use a multimeter to test the power supply to the SCR control system. Check the fuses with a loaded circuit to avoid misdiagnosis.
Using a scanner, activate the EAS fuel injector to test the control circuit output voltage. If the voltage is insufficient, the controller is most likely defective or has a programming error.
When the voltage output circuit is within the specification, use a multimeter to check the EAS fuel injector. If the injector does not meet the manufacturer’s specifications, it is most likely out of order.
In most cases, the cause of the P20D4 error is precisely the failure of the EAS fuel injector.
On what cars does this problem occur more often?
The problem with the P20D4 code can occur on different cars, but there are always statistics on which brands this error is more common. Here is a list of some of them:
Chevrolet
Ford
GMC
Mercedes (Mercedes Sprinter, w163, w211, w220)
Other errors can sometimes be found with DTC P20D4. The most common are the following: P20D1, P20D2, P20D3, P20D5, P20D6.
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