P20C3 Code - Reductant Heater 'C' Control Circuit Low
Quick Answer
The reductant heater and sender assembly contains pickup tube for reductant pump module, an electric heating element, a reductant temperature sensor and an electrode type level sensor. Common causes include Faulty Reductant Heater, Reductant Heater harness is open or shorted, Reductant Heater 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
- P20C3 indicates Reductant Heater 'C' Control Circuit Low.
- Common causes
- Common causes include Faulty Reductant Heater, Reductant Heater harness is open or shorted, Reductant Heater 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 P20C3 Description
What are the Possible Causes of the DTC P20C3?
- Faulty Reductant Heater
- Reductant Heater harness is open or shorted
- Reductant Heater circuit poor electrical connection
How to Fix the DTC P20C3?
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 P20C3 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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Information for Specific Makes
- P20C3 Chevrolet — Reductant Heater 'C' Control Circuit Low
- P20C3 Ford — Reductant Heater 'C' Control Circuit Low
- P20C3 GMC — Reductant Heater 'C' Control Circuit Low
Frequently Asked Questions about P20C3 Code
1. What are the common symptoms of OBDII code P20C3 related to the Reductant Heater 'C' Control Circuit Low?
- Common symptoms include the check engine light being illuminated, reduced engine performance, and potential issues with emissions control.
2. What could be causing the Reductant Heater 'C' Control Circuit Low fault code P20C3?
- Possible causes may include a faulty reductant heater, damaged wiring or connectors in the heater circuit, or issues with the powertrain control module (PCM).
3. How can I diagnose the cause of OBDII code P20C3 indicating a Reductant Heater 'C' Control Circuit Low?
- Diagnosis typically involves checking the reductant heater for proper operation, inspecting the wiring and connectors for damage, and using a diagnostic scan tool to assess the PCM's communication with the heater circuit.
4. Can I continue driving my vehicle with OBDII code P20C3 present?
- It is not recommended to ignore this fault code, as it can lead to decreased fuel efficiency, increased emissions, and potential damage to the emissions control system. It is advisable to address the issue promptly.
5. What are the repair options for resolving OBDII code P20C3 indicating a Reductant Heater 'C' Control Circuit Low?
- Repair options may include replacing the faulty reductant heater, repairing any damaged wiring or connectors in the heater circuit, and resetting the fault code with a diagnostic tool after addressing the underlying issue.
6. Are there any DIY tips for troubleshooting OBDII code P20C3 at home?
- While basic checks like inspecting the wiring connections and ensuring the reductant heater is receiving power can be done at home, diagnosing and repairing the specific cause of the fault code may require professional equipment and expertise.
7. Will resetting the fault code clear OBDII code P20C3 related to the Reductant Heater 'C' Control Circuit Low?
- Resetting the fault code may temporarily turn off the check engine light, but if the underlying issue causing the fault code is not addressed, the code is likely to reappear upon further driving.
8. How urgent is it to address OBDII code P20C3 associated with the Reductant Heater 'C' Control Circuit Low?
- While your vehicle may still be operable with this fault code present, it is important to address it in a timely manner to prevent potential damage to the emissions control system and ensure optimal engine performance.
9. Can extreme weather conditions affect the likelihood of triggering OBDII code P20C3 for the Reductant Heater 'C' Control Circuit Low?
- Yes, extreme cold temperatures can sometimes lead to issues with reductant heaters, potentially increasing the likelihood of triggering this fault code. It is important to consider environmental factors when diagnosing the problem.
10. Is it necessary to visit a dealership or can an independent mechanic address OBDII code P20C3 related to the Reductant Heater 'C' Control Circuit Low?
- An independent mechanic with experience in diagnosing and repairing emissions control systems should be able to address this fault code effectively. Dealerships are also equipped to handle such issues, but independent mechanics may offer more cost-effective solutions.
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