P2338 Trouble Code

View P2338 obd/2 error code description and symptoms. P2338 engine photo

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

P2338 Error Code Repair Process :

If your p2338 cylinder 3 above knock threshold check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P2338 and engine control unit are in charge of monitoring a bunch of different p2338 cylinder 3 above knock threshold, and if they get a reading that's a little out of whack, up pops the check engine light.

P2338 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Common Causes of P2338

A common cause of code P2338 is the failure of P2338 Cylinder 3 Above Knock Threshold, but there are several other possible causes as well, such as ;

Dirty Oil
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
Intake Valve Timing Control Solenoid Valve circuit poor electrical connection
Variable Camshaft Timing solenoid stuck open

P2338 code for all cars

You can view according P2338 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P2338 Bentley 4.25-litre

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

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