Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there is a problem with the part of the car that helps clean the exhaust. It's like when a spray bottle gets stuck and sprays too much cleaner on the window.
The P20CE code indicates that the control circuit for the exhaust aftertreatment fuel injector 'A' is experiencing a high voltage condition.
The P20CE code is triggered when the Engine Control Module (ECM) detects a higher than normal voltage in the control circuit of the exhaust aftertreatment fuel injector 'A'. This injector is part of the system that reduces emissions by injecting a small amount of fuel into the exhaust to help burn off pollutants.
• Check Engine Light is on
• Possible decrease in fuel efficiency
• Higher emissions
• Faulty exhaust aftertreatment fuel injector
• Wiring issues such as short to voltage in the injector circuit
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the injector for proper operation and resistance.
• Repair or replace damaged wiring or connectors.
• Replace the faulty exhaust aftertreatment fuel injector.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect and maintain the exhaust system.
• Ensure proper fuel quality.
• Keep the vehicle's software updated.
Sensor Issue
• Address the issue promptly to avoid increased emissions.
• Consult with a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has become more common with the increased use of aftertreatment systems in diesel engines to meet emission standards.
Moderate – It should be addressed soon to prevent potential damage to the emissions system.
Driving with a malfunctioning emissions system can lead to higher emissions and potential legal issues in areas with strict emissions regulations.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The exhaust aftertreatment fuel injector is typically located near the exhaust system, often close to the catalytic converter or diesel particulate filter.
Q: Can I drive with a P20CE code?
A: It's possible to drive with this code, but it's not recommended as it can lead to higher emissions and potential damage to the exhaust system.
Q: How can I reset the P20CE code?
A: You can reset the code using an OBD-II scanner, but it's important to fix the underlying issue first to prevent the code from returning.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.