Symptoms of P0649 OBD II Trouble Code
- Speed control system inoperative
- Other stored (speed control) codes
Common Causes of P0649 OBD II Trouble Code
- Faulty PCM
- PCM programming error
- Open or shorted speed control lamp control circuit
- Defective speed control lamp bulb
Severity of P0649 OBD II Trouble Code
All internal control module codes should be taken seriously. A stored code P0649 (with speed control lamp illumination) will likely result in a loss of speed control activation.