Description of DTC code P0661

The ECM (Engine Control Module) monitors and adjusts the sensors that operate the vehicle. Besides, it detects faults within the system and circuits.

One of the systems monitored by the ECM is the intake manifold adjustment valve. This valve contributes to engine performance and driveability. Besides, it regulates the pressure between the intake gaskets, redirects air into intake channels, and changes engine flow and performance.

Diagnostic code P0661 OBDII indicates that the ECM has found an excessively low electrical reading on the intake valve in bank number 1. This code is activated due to mechanical or electrical failure. Especially if the valve is in an area of extreme cold exposure, the valve may malfunction.

Symptoms of fault code P0661

  • Engine malfunction light (Check Engine).
  • Engine performance decreases.
  • Increases fuel consumption.
  • Failure to start.
  • Difficulty in starting the engine in cold weather

Causes of OBD2 P0661

The reasons for setting the fault code P0661 OBD2 are

  • Damaged intake manifold adjustment valve components.
  • Valve wiring in poor condition.
  • The valve may be stuck.
  • Contamination of the valve.
  • The valve on the manifold may be defective.

Possible solutions of the DTC code P0661

These are steps to solve the failures caused by the error code P0661 OBDII:

  • Consult the TSB (Technical Service Bulletins), the manufacturer may know the solution to your problem.
  • Check all the wires that relate to the manifold adjustment valve. Also, check the valve connector. If you find problems with any of these components, you should make the necessary repairs.
  • Check the right functioning of the valve, you can use a scanning tool for this purpose.
  • Disconnect the valve and check inside the manifold for blockages. If no items are obstructing it, but there are clicking noises, the valve may be defective, you should replace it.


Codes related to P0661

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