Error Code P20E1: What It Means & What To Do?
OBD Code P20E1 - Exhaust Aftertreatment Fuel Pressure Sensor Circuit Intermittent/Erratic
The
trouble code P20E1 can be explicated as Exhaust Aftertreatment Fuel Pressure
Sensor Circuit Intermittent/Erratic. This trouble code is generic, which would
mean that it can apply to all the vehicles which are equipped with the OBD-II
or the vehicles which are made since 1996 up to the present. The specifications
on the definition, the troubleshooting steps as well as repairs can always vary
from one vehicle make to another. This can happen because of a lot of reasons and
the mechanic should diagnose the specific cause for this code.
Learn More About OBD Error Code P20E1
It is the engine control module which would examine the fuel pressure sensor circuit for the exhaust aftertreatment system. This trouble code would be set by the ECM when the fuel pressure sensor circuit for the exhaust aftertreatment system would not be as per the parameters set by the manufacturer.
What causes this problem with the Exhaust Aftertreatment Fuel Pressure Sensor Circuit Intermittent/Erratic?
- Damaged EAS fuel pressure sensor
- Imperfect EAS fuel supply pump
- Issue of unbolted wiring in the EAS fuel pressure sensor circuit
- There can be distorted EAS controller/PCM or programming error
Replace/Repair These Parts To Fix Code P20E1
- Engine Control Module – ECM failures and faults can be very difficult to find and resolve as these are very rare and might require a complete reprogramming of the system to avoid wrong codes from getting stored in the system, leading to misdiagnosis. Replace it now!
- Powertrain Control Module – Faulty PCM can disrupt the normal functioning of the vehicle by affecting the transmission system and the fuel delivery system. This will cause the system to store wrong OBD error and thus can lead to misdiagnosis.
- Diagnostic Tools – Take help of a professional mechanic to diagnose OBD code error. Use high grade diagnostic tools to resolve this issue. Buy new tools and equipment from us!
- Fuel Injector – Bad fuel injectors can cause starting issues, poor idles and affected performance. Thus, the replacements are in order. Buy new fuel injectors now!
- Exhaust Gas Recirculation Valve - If the PCM detects any fault in the vehicle’s EGR valve circuit, it will set up the check engine light so that the driver is notified about the fault. Properly check for the EGR valve faults leading to this OBD code getting stored in the system. Get the faulty EGR valve replaced or else this fault code can turn up.
- Diesel Exhaust Fluid Pump – Faulty DEF pump can lead to increased emission and affected vehicle performance. It can also hamper the fuel economy and the power output of the vehicle. Thus, replace faulty DEF pump now!
Symptoms Of The OBD Error Code P20E1
It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P20E1 here:
Common Symptoms
- Visibility in the check engine light
- Decrease in the overall fuel efficiency
- There might be a lot of black smoke coming out from vehicle exhaust
- The engine performance might start declining
How To Correct Exhaust Aftertreatment Fuel Pressure Sensor Circuit Intermittent/Erratic Issue
If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P20E1:
- The malfunctioning EAS controller should be repaired or replaced as per the need
- It is necessary to perform proper service of the unsound EAS fuel pressure sensor circuit
- Adjust the flawed EAS fuel supply pump
- Repair or replace the loose, broken or corroded wiring
- Rehabilitate the defaults in the fuel injector
- You must fix the defective or corroded connectors
- Make sure to mend the faulty exhaust system parts
- Carefully adjust the faults in the EAS fuel pressure sensor
- Recondition the non-functioning terminals
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Easy Diagnosis Of Engine Error OBD Code P20E1
If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:
Make use of a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of vehicle specific diagnostic information to diagnose OBD code P20E1.
Begin the diagnosis by visually inspecting the EAS wiring harnesses and connectors. Repair or replace burnt or damaged wiring and or connectors before doing any further diagnosis.
Plug the scanner into the vehicle diagnostic connector and retrieve all stored codes and pertinent freeze frame data. Note this information down before clearing the fault codes. Make the PCM to go into readiness mode or reset the code by test driving the vehicle.
If the PCM enters readiness mode, the code is intermittent and will be difficult to diagnose. If the code gets reset immediately, start searching for the correct information source to get diagnostic flow charts, connector pin-out charts as well as constituent testing procedures and specifications.
Test (voltage drop) the power supply to the EAS fuel supply using a DVOM. Check fuses with the circuit loaded to avoid misdiagnosis. With the help of the scanner, activate the EAS fuel pressure sensor (solenoid) and test output control circuit voltage, if the power battery voltage and ground circuit are discovered appropriately.
There are chances that the controller is bad or has experienced a programming error, if the voltage is insufficient. If the voltage output circuit is within parameters, use the DVOM and test the EAS fuel pressure sensor. If the injector does not meet manufacturer’s specifications, then it might have failed and shall be replaced.
Common Mistakes When Diagnosing The P20E1 Code
- Powertrain control module related issues
- Quirks in the exhaust aftertreatment fuel pressure sensor
- Issues related with the car wiring