P2042 Dodge Code - Reductant Temperature Sensor Circuit
Quick Answer
The P2042 diagnostic trouble code (DTC) for Dodge vehicles specifically relates to the Reductant Temperature Sensor Circuit. Common causes include Faulty reductant temperature sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or contamination in the sensor circuit. 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
- P2042 Dodge indicates Reductant Temperature Sensor Circuit.
- Common causes
- Common causes include Faulty reductant temperature sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or contamination in the sensor circuit.
- 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 P2042 Dodge Description
The P2042 diagnostic trouble code (DTC) for Dodge vehicles specifically relates to the Reductant Temperature Sensor Circuit. This code indicates that there is a malfunction in the circuit that monitors the temperature of the reductant, which is a fluid used in the Selective Catalytic Reduction (SCR) system to reduce harmful emissions in diesel vehicles. The reductant temperature sensor plays a crucial role in ensuring the proper operation of the SCR system by providing accurate temperature readings to the engine control module (ECM).
Common Causes of P2042 Dodge
- Faulty reductant temperature sensor
- Damaged wiring or connectors in the sensor circuit
- Corrosion or contamination in the sensor circuit
- ECM software issues
- Faulty ECM
Symptoms of P2042 Dodge
- Check engine light illuminated
- Reduced engine power
- Increased emissions output
- Poor fuel efficiency
- Difficulty starting the vehicle
How to Fix P2042 Dodge
- Begin by using a diagnostic scanner to retrieve the specific fault codes, including P2042, and confirm the issue with the reductant temperature sensor circuit.
- Inspect the wiring and connectors in the sensor circuit for any damage, corrosion, or contamination. Repair or replace any damaged components as needed.
- Test the reductant temperature sensor using a multimeter to check for proper resistance values and functionality. Replace the sensor if it is faulty.
- Clear the DTCs from the ECM memory and perform a road test to verify that the repair has resolved the issue.
- If the check engine light remains off and the vehicle operates normally, the repair process is complete.
Cost to Fix P2042 Dodge
The cost of repairing a P2042 code related to the Reductant Temperature Sensor Circuit can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the parts for this repair, including a new reductant temperature sensor, wiring, and connectors, may range from $100 to $300. Labor costs can add an additional $100 to $200, bringing the total repair estimate to approximately $200 to $500. It's important to note that these are rough estimates, and actual costs may vary based on the vehicle's make and model, as well as the location and rates of the repair shop. Be sure to consult with a qualified mechanic for a more accurate cost estimate.
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