Symptoms of P0488 OBD II Trouble Code
- Malfunction Indicator Lamp (MIL) illuminated
- Longer than normal active aftertreatment regeneration times (it will take longer for the exhaust system to get hot and burn off the soot that has built up inside the diesel particulate filter/catalytic converter)
Common Causes of P0488 OBD II Trouble Code
- Open in the signal circuit between the EGR throttle control valve and the PCM
- Short to voltage in the signal circuit to the EGR throttle control valve
- Short to ground in the signal circuit to the EGR throttle control valve
- EGR throttle control valve faulty ? internally shorted
- Failed PCM - unlikely