P20C5 Code - Reductant Heater 'D' Control Circuit/Open
Quick Answer
The P20C5 diagnostic trouble code (DTC) refers to a problem with the Reductant Heater 'D' Control Circuit/Open in a vehicle's selective catalytic reduction (SCR) system. Common causes include Faulty Reductant Heater 'D', Wiring or connector issues in the control circuit, Corrosion or damage to the electrical connections. 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
- P20C5 indicates Reductant Heater 'D' Control Circuit/Open.
- Common causes
- Common causes include Faulty Reductant Heater 'D', Wiring or connector issues in the control circuit, Corrosion or damage to the electrical connections.
- 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.
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Code P20C5 Description
The P20C5 diagnostic trouble code (DTC) refers to a problem with the Reductant Heater 'D' Control Circuit/Open in a vehicle's selective catalytic reduction (SCR) system. The SCR system is responsible for reducing harmful emissions by injecting a urea-based solution (diesel exhaust fluid) into the exhaust stream, which reacts with nitrogen oxides to convert them into harmless nitrogen and water vapor. The Reductant Heater 'D' is a component that helps to warm up the diesel exhaust fluid to optimize the SCR system's efficiency.
Common Causes of P20C5
- Faulty Reductant Heater 'D'
- Wiring or connector issues in the control circuit
- Corrosion or damage to the electrical connections
- Software or programming issues
- Environmental factors such as exposure to moisture or extreme temperatures
Symptoms of P20C5
- Check engine light illuminated
- Reduced fuel efficiency
- Failed emissions test
- Engine performance issues
- Increased emissions of pollutants
How to Fix P20C5
- Begin by conducting a visual inspection of the Reductant Heater 'D' and its wiring harness to check for any visible damage or corrosion.
- Use a multimeter to test the continuity of the control circuit and check for any open circuits or shorts.
- Inspect the electrical connectors for proper connection and cleanliness, addressing any issues as needed.
- If no visible issues are found, perform a diagnostic scan using a professional diagnostic tool to identify any specific faults in the system.
- Replace the Reductant Heater 'D' or repair any damaged wiring or connectors as necessary to resolve the issue.
Cost to Fix P20C5
The typical repair costs for addressing a P20C5 code can vary depending on the specific vehicle make and model, as well as the extent of the issue. In general, the cost of replacing a Reductant Heater 'D' or repairing wiring and connectors can range from $200 to $500, including parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. For a more accurate estimate, it is recommended to consult with a local auto repair shop.
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Code P20C5 Information for Specific Makes
- P20C5 Chevrolet — Reductant Heater 'D' Control Circuit/Open
- P20C5 Ford — Reductant Heater 'D' Control Circuit/Open
- P20C5 GMC — Reductant Heater 'D' Control Circuit/Open
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