P205C GMC Code - Reductant Tank Temperature Sensor Circuit Low Voltage
Quick Answer
The P205C GMC code indicates a problem with the reductant tank temperature sensor circuit, specifically pointing to low voltage. Common causes include Faulty reductant tank temperature sensor, Wiring or connector issues in the sensor circuit, ECM software or hardware problems. 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
- P205C GMC indicates Reductant Tank Temperature Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty reductant tank temperature sensor, Wiring or connector issues in the sensor circuit, ECM software or hardware problems.
- 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 P205C GMC Description
The P205C GMC code indicates a problem with the reductant tank temperature sensor circuit, specifically pointing to low voltage. The reductant tank temperature sensor is a crucial component of the vehicle's selective catalytic reduction (SCR) system, which helps reduce harmful emissions by injecting a urea-based solution (diesel exhaust fluid, or DEF) into the exhaust stream. The sensor monitors the temperature of the DEF in the reductant tank to ensure optimal operation of the SCR system.
Common Causes of P205C GMC
- Faulty reductant tank temperature sensor
- Wiring or connector issues in the sensor circuit
- ECM software or hardware problems
- DEF contamination or quality issues
- Operating the vehicle with low DEF levels
Symptoms of P205C GMC
- Check engine light illuminated
- Poor fuel efficiency
- Engine performance issues
- Failed emissions test
- SCR system fault codes
How to Fix P205C GMC
- Diagnose the code using a scan tool to verify the issue and pinpoint the exact cause.
- Inspect the reductant tank temperature sensor, wiring, and connectors for any visible damage or corrosion.
- Test the sensor's resistance and voltage output to determine if it is functioning within specifications.
- Replace the reductant tank temperature sensor if it is found to be faulty, ensuring proper installation and connection.
- Clear the code and reset the ECM to monitor the system for any recurring issues.
Cost to Fix P205C GMC
The typical repair costs for addressing a P205C GMC code can vary depending on the specific cause of the issue and the cost of parts and labor. In general, replacing a faulty reductant tank temperature sensor can range from $100 to $300, with additional costs for diagnostic testing and any necessary repairs to the wiring or connectors. It is recommended to consult with a trusted mechanic or auto repair shop for a more accurate cost estimate based on the vehicle's make and model, as well as local labor rates.
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