P0201 Code - Injector Circuit Malfunction Cylinder 1

What Does p0201 Mean?

The diagnostic trouble code P0201 tells us the ECM has detected a malfunction with the cylinder 1 injector circuit. This code indicates out-of-range performance was detected in the operation of cylinder 1 injector circuit.

Once a malfunction is detected, a Check Engine Light is triggered and failsafe mode is enabled. Failsafe mode will remain in effect until normal operation is detected or the code is repaired.

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What are the common causes of p0201 ?

To sum things up, the common causes for code P0201 are as follows:

• Failed injector
• Fault in the injector circuit
• Problem with the PCM (injector driver)

How do you troubleshoot p0201 ?

If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector.



Process Tips

Diagnostic trouble code P0201 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P0201.

Fortunately, P0201 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

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