P0204 Code - Injector Circuit Malfunction Cylinder 4

What Does p0204 Mean?

• The Engine Control Module (ECM) runs checks on all systems at startup, and many times a second while the vehicle is running. P0204 tells technicians a malfunction was found for cylinder 4 injector circuit.
• This code is similar to P0200 - P0203, and P0205 - P02012.
• Lean and rich condition codes along with misfire codes may be found with P0204 as well.

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What are the common causes of p0204 ?

The most common cause of this code is damage to wiring caused by wildlife. The warm area atop the engine provides shelter for small animals, where they proceed to gnaw the wiring for some strange reason. Other causes include a faulty fuel injector, corroded electrical wiring or connector faces, or a faulty fuel injector driver in the PCM.

How do you troubleshoot p0204 ?

While fuel economy was increased, acceleration was seriously compromised, and the loss of engine vacuum led to a dangerous loss of braking assist when the P0204 code system was in four-cylinder mode. In addition to these issues, while the company proposed a hydraulically controlled system that could be switched from within the car, the version they implemented had to be manually changed in the engine compartment using hand tools.



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