P0660 OBD II Trouble Code Intake Manifold Tuning Valve Control Circuit/Open Bank 1

How to quickly diagnose, repair, and causes of a P0660 diagnostic code which indicates a detected general fault or open condition in the intake manifold tuning valve control circuit on bank 1.

Symptoms of P0660 OBD II Trouble Code

  • Poor engine performance
  • Loud clicking noise coming from engine bay
  • Decreased fuel economy
  • Possible misfire on startup
  • Reduced engine power
  • Power range altered
  • Cold start issues

Common Causes of P0660 OBD II Trouble Code

  • Defective intake manifold (runner) tuning valve
  • Broken valve parts
  • Stuck valve
  • Extreme cold
  • Wiring issue (e.g. chafed, cracked, corroded, etc.)
  • Broken electrical connector
  • ECM issue
  • Valve contamination

Severity of P0660 OBD II Trouble Code

Depending on the actual problem related to your case, this may range from nothing to worry about to something fairly severe and potentially damaging to your engine's internals. It would be a good idea to error on the side of caution when dealing with mechanical parts such as the intake manifold tuning valve. The potential for unwanted parts to enter the engine's combustion chamber is there so keep that in mind if you were thinking of putting this off until another day.