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
Code | Information |
---|---|
Meaning | P20CE: 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
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use 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 Circuit | Use 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 Module | Verify that the control module is functioning correctly and is not causing the high voltage in the injector circuit. | Diagnostic Tool |
Repair or Replace Wiring/Injector | If 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 Drive | After 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 Codes | After the test drive, rescan the vehicle to ensure the P20CE code does not return. | OBD-II Scanner |

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