C2690 Trouble Code

View C2690 obd/2 error code description and symptoms. C2690 engine photo

The issue covered by the bulletin involves a power steering noise/whine or fluid leak from the power steering pump, gear or high pressure side power steering hose during extreme low outdoor temperature operation.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

C2690 Error Code Repair Process :

If your vehicle failed a C2690 test and the C2690 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses illuminated entry relay short to battery a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look illuminated entry relay short to battery: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

C2690 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

Common Causes of C2690

A common cause of code C2690 is the failure of Illuminated Entry Relay Short To Battery, but there are several other possible causes as well, such as ;

Exhaust gas leaks
Faulty spark plug (s)
Faulty variable valve timing (VVT)
Three way catalyst converter Bank 1

C2690 code for all cars

You can view according C2690 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C2690 Italdesign Medici

+C2690 Bmw Wartburg

+C2690 De Dion Bouton 6 Hp

+C2690 Suzuki Wagon

+C2690 Mercedes-benz Glk Class

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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