P20CD GMC Code - Exhaust Aftertreatment Fuel Injector Control Circuit Low Voltage
Quick Answer
The exhaust fuel addition injector assembly is mounted on the outlet of the turbocharger sub-assembly, and low-pressure fuel is supplied to the exhaust fuel addition injector assembly by the feed pump in the supply pump assembly. Common causes include Faulty Exhaust Aftertreatment Fuel Injector, Exhaust Aftertreatment Fuel Injector harness is open or shorted, Exhaust Aftertreatment Fuel Injector circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P20CD GMC indicates Exhaust Aftertreatment Fuel Injector Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty Exhaust Aftertreatment Fuel Injector, Exhaust Aftertreatment Fuel Injector harness is open or shorted, Exhaust Aftertreatment Fuel Injector circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P20CD GMC Description
What are the Possible Causes of the DTC P20CD GMC?
- Faulty Exhaust Aftertreatment Fuel Injector
- Exhaust Aftertreatment Fuel Injector harness is open or shorted
- Exhaust Aftertreatment Fuel Injector circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P20CD GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P20CD GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P20CD GMC Code
1. What are the common symptoms of OBDII code P20CD GMC (Exhaust Aftertreatment Fuel Injector Control Circuit Low Voltage)?
- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.
2. What are the potential causes of OBDII code P20CD GMC?
- The code P20CD GMC can be caused by issues such as a faulty exhaust aftertreatment fuel injector, wiring problems, or a malfunctioning powertrain control module (PCM).
3. How serious is OBDII code P20CD GMC?
- While the code may not cause immediate harm to the vehicle, it can lead to poor engine performance and reduced fuel efficiency if left unresolved.
4. How can I diagnose OBDII code P20CD GMC?
- Diagnosis typically involves using an OBDII scanner to read the code, followed by inspecting the exhaust aftertreatment fuel injector, wiring, and related components for any visible issues.
5. Can I continue driving with OBDII code P20CD GMC?
- It is not recommended to continue driving with this code, as it can lead to further engine problems and potential damage if left unaddressed.
6. How can I repair OBDII code P20CD GMC?
- Repair options include replacing the faulty exhaust aftertreatment fuel injector, repairing any damaged wiring, or resetting the PCM after fixing the underlying issue.
7. Are there any DIY tips for resolving OBDII code P20CD GMC?
- DIY enthusiasts can start by checking the wiring connections to the exhaust aftertreatment fuel injector and ensuring they are secure and free of damage before considering further repairs.
8. Can a faulty sensor trigger OBDII code P20CD GMC?
- While a faulty sensor is not a common cause of this specific code, it is still advisable to inspect all relevant sensors in the exhaust aftertreatment system during diagnosis.
9. Will resetting the check engine light resolve OBDII code P20CD GMC?
- Simply resetting the check engine light without addressing the underlying issue will not resolve the code, as it will likely reappear once the PCM detects the problem again.
10. How much can I expect to pay for repairs related to OBDII code P20CD GMC?
- The cost of repairs can vary depending on the exact cause of the code, but replacing the exhaust aftertreatment fuel injector or addressing wiring issues may range from $200 to $500 at a repair shop.
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