Fix P20CE: STEP-BY-STEP diagnostic GUIDE!

The P20CE: Exhaust Aftertreatment Fuel Injector ‘A’ Control Circuit High refers to a high voltage condition in the control circuit for exhaust aftertreatment fuel injector ‘A’. This could indicate an electrical problem, such as excessive voltage being sent to the injector, which may be due to wiring faults, a malfunctioning injector, or a faulty control module.

P20CE – Quick Overview

CodeInformation
MeaningP20CE: Exhaust Aftertreatment Fuel Injector ‘A’ Control Circuit High
Is it serious?Yes, this can cause improper fuel injection in the aftertreatment system, potentially affecting emissions and engine performance.
Possible causes– High voltage in the fuel injector ‘A’ control circuit
– Faulty fuel injector ‘A’
– Faulty control module
How to diagnose?– Measure voltage in the injector control circuit
– Test the fuel injector ‘A’
– Check the control module functionality

P20CE Meaning

The P20CE fault code indicates that the voltage in the control circuit for exhaust aftertreatment fuel injector ‘A’ is higher than expected. This excessive voltage can cause the injector to malfunction, leading to improper exhaust aftertreatment and potential emissions issues. The high voltage could be due to faulty wiring, a defective injector, or a malfunction in the control module responsible for regulating the injector.

Step-by-step diagnostic guide

ActionDescriptionTools Needed
Check for Other CodesUse an OBD-II scanner to check for additional related codes that may provide more insight into the high voltage issue.OBD-II Scanner
Measure Voltage in the Injector Control CircuitUse a multimeter to measure the voltage in the control circuit for fuel injector ‘A’. Ensure it is within the manufacturer’s specified range.Multimeter
Test Fuel Injector ‘A’Use a diagnostic tool to test fuel injector ‘A’ for proper function and ensure it is not receiving excessive voltage.Multimeter, Diagnostic Tool
Check the Control ModuleVerify that the control module is functioning correctly and is not causing the high voltage in the injector circuit.Diagnostic Tool
Repair or Replace Wiring/InjectorIf high voltage is detected, inspect the wiring for damage or shorts and repair or replace the injector if necessary.Wiring Kit, Replacement Injector
Clear the Code and Test DriveAfter completing repairs, clear the code using an OBD-II scanner and test drive the vehicle to ensure the problem is resolved.OBD-II Scanner, Vehicle Manual
Recheck for CodesAfter the test drive, rescan the vehicle to ensure the P20CE code does not return.OBD-II Scanner
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