C1067 Code:

OBD-II Diagnostic Chassis (C) Trouble Code

Possible Cause

Possible causes of C1067 include a faulty oxygen sensor, faulty electrical connector at the oxygen sensor, faulty or shorted wiring in the oxygen sensor circuit, a blown fuse for the oxygen sensor (if applicable), low or excessive fuel pressure, a vacuum leak on the engine, excessive exhaust leaks, or a faulty PCM.

Common Symptoms

  1. At any rate, make sure that the fluid level is within manufacturer's specified recommendations and that the fluid is in good condition
  2. Repair or replace any open, shorted, damaged, or corroded items as required and retest the system to make sure that repairs were successful
  3. The PCM will read the sensor resistance and pass it
  4. If either the reference voltage or ground circuits are open, use the digital volt/ohmmeter to check for continuity (disconnect all related control modules from the circuit before checking circuit resistance or controller damage may occur) and resistance in all circuits

Similar Problems

Accelerator Pedal Position (APP) Sensor 1 Performance
Air Conditioning (A/C) Clutch Feedback Circuit High Voltage
PCM Stack Overrun

C1067 Troubleshooting

A sure sign of this is smoke or steam being emitted from underneath the hood. The ignition timing could be set incorrectly and will require adjustment. If, when looking under the hood, you notice that the drive belts appear loose, they need to be tightened or completely replaced. If there is a noticeable pool of fluid underneath the car, this could be a sign of the cylinder head gasket failing. That will be confirmed in the form of billowing smoke being blown from the exhaust system. Parts or components should not be replaced with reference to only a C1067 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

How to turn off C1067 check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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