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P0660 – What Does It Mean and How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.

Definition

P0660 is an OBD-II Code that refers to Intake Manifold Tuning Valve Control Circuit/Open Bank 1

Meaning

A P0660 code is a generic diagnostic trouble code that occurs when the PCM/ECM receives a signal indicating an an error in the intake manifold tuning valve circuit. The intake manifold tuning valve (or intake manifold runner valve) is a critical component of your intake manifold’s operation. This part refers to the actuator that operates your vehicle’s intake manifold flaps.

When your car’s power control module (PCM) detects an electrical problem or an open electrical circuit, it sets off the P0660 code.

Causes

Common causes for this code include:

  • Problematic intake manifold (runner) tuning valve 
  • Damaged valve parts 
  • Valve is stuck 
  • Very cold conditions 
  • An issue with the wiring (e.g. chafed, cracked, corroded, etc.) 
  • Broken electrical connector 
  • ECM issue Valve contamination

Symptoms

The symptoms of a P0660 code are:

  • Engine performance has decreased
  • The car’s fuel efficiency is low
  • During startup, the engine misfires
  • Starting difficulties upon cold starts
  • The Power range has altered
  • From the engine bay, there is a loud clicking noise

Diagnosis

To diagnose a P0660 DTC code, a technician would:

  1. Scan for codes in the ECM and look at the freeze frame data for failure.
  2. Visually inspect the wiring and connectors for signs of damage or corrosion.
  3. Check the operation of the intake manifold tuning valve with a scanner.
  4. Test the intake manifold tuning valve with a multimeter to see if it is getting power and ground.
  5. If necessary, replace the intake manifold tuning valve as well as any damaged wiring or connectors.
  6. Clear the codes and test drive the vehicle to see if the code returns.

Common mistakes

The following are some of the most common mistakes that a technician may make when diagnosing a P0660 code:

  • Not thoroughly inspecting all the wiring and connectors.
  • Not checking the power and ground to the intake manifold tuning valve.
  • Not checking for other DTC codes that may be related to the problem.
  • Not thoroughly testing the intake manifold tuning valve.
  • Not clearing the codes and testing the vehicle after repairing the problem.

How serious is this?

A P0660 code is a serious code that can lead to decreased engine performance, fuel efficiency, and starting difficulties. If the code is not diagnosed and repaired in a timely manner, it could result in further damage to the vehicle.

What repairs can fix the code?

The following are solutions that may fix this problem:

  • Bad wiring, connectors, and modules repaired or replaced
  • Replacing the CAN bus
  • Replacing or reprograming the PCM itself 

Related codes

A P0660 is related to and may be accompanied by the following codes:

P0661- Intake Manifold Tuning Valve Control Circuit/Open Bank 2

P0664- Intake Manifold Tuning Valve Control Circuit/Short to Ground Bank 1

P0665- Intake Manifold Tuning Valve Control Circuit/Short to Voltage Bank 1

P0666- Intake Manifold Tuning Valve Control Circuit/Open or Shorted Bank 2

P0667- Intake Manifold Tuning Valve Control Circuit/Short to Ground Bank 2

P0668- Intake Manifold Tuning Valve Control Circuit/Short to Voltage Bank 2

Conclusion

In conclusion, the P0660 code is a diagnostic trouble code that refers to a problem with the intake manifold tuning valve circuit. This code may be caused by a number of different issues, including wiring problems, connector issues, or module issues. To properly diagnose and fix this code, a technician would need to inspect all the wiring and connectors, check for proper voltages and ground signals, command the intake manifold runner control valve to open and close, and check for proper valve operation.