Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a special injector that helps clean the exhaust. This code means that the injector isn't working as well as it should.
The P20CC code indicates a problem with the performance of the fuel injector used in the exhaust aftertreatment system, which is responsible for reducing emissions.
The P20CC code is triggered when the Engine Control Module (ECM) detects that the Exhaust Aftertreatment Fuel Injector A is not performing within the expected parameters. This injector is crucial for injecting fuel into the exhaust system to aid in the regeneration of the Diesel Particulate Filter (DPF) or other aftertreatment components.
• Check Engine Light (CEL) is on
• Increased exhaust emissions
• Possible decrease in fuel efficiency
• Faulty exhaust aftertreatment fuel injector
• Clogged injector nozzle
• Wiring or connector issues in the injector circuit
ECM: Engine Control Module
DPF: Diesel Particulate Filter
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage
• Test the injector for proper operation
• Replace the faulty injector
• Clean the injector nozzle if clogged
• Repair or replace damaged wiring/connectors
• OBD-II scanner
• Multimeter
• Injector cleaning kit
$200 - $600
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regular maintenance of the exhaust system
• Use quality fuel to prevent injector clogging
• Regularly check the vehicle for any warning lights
Engine Performance
• Address the issue promptly to avoid further damage
• Consult a professional mechanic if unsure about the repair
• Monitor fuel efficiency for any changes
Check with your vehicle manufacturer for warranty coverage on emission-related components.
The P20CC code has been reported in diesel vehicles equipped with advanced emission control systems since the implementation of stricter emission standards.
Moderate – While the vehicle may still be drivable, addressing the issue promptly will help maintain performance and emissions standards.
Ignoring emission-related codes may lead to failing emissions tests and potential fines in areas with strict emissions regulations.
• Engine at operating temperature
• Vehicle running under normal driving conditions
The exhaust aftertreatment fuel injector is typically located near the exhaust system, often close to the Diesel Particulate Filter (DPF).
Q: Can I drive with a P20CC code?
A: While you may be able to drive, it's best to fix the issue soon to maintain vehicle performance and emissions standards.
Q: What happens if I ignore the P20CC code?
A: Ignoring the code can lead to increased emissions, potential damage to the exhaust system, and failing emissions tests.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
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.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.