P1477
Particulate Matter Sensor Temperature Circuit Low Voltage
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$33–89 (est.)
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Problems with diesel particulate filter regeneration
- Unstable engine operation
Causes
- Open or short circuit in the sensor circuit
- Particulate filter temperature sensor malfunction
- Connector problems or contact corrosion
- ECU malfunction
- Wiring harness damage
How to Fix
- Check the continuity of the diesel particulate filter temperature sensor circuit
- Check connectors and contacts for corrosion or damage
- Replace the diesel particulate filter temperature sensor if necessary
- Check and replace wiring harness if necessary
- Check the operation of the computer