Cylinder 1 Injector Circuit High
What does P0262 mean?
The P0262 code means the vehicle's onboard diagnostic system has detected: Cylinder 1 Injector Circuit High. This is a moderate severity code.
Common Symptoms
- Engine misfire on cylinder 1
- Rough idle and vibration
- Check Engine Light illuminated
- Cylinder 1 not firing
- Poor fuel economy
Probable Causes (Ranked by Likelihood)
- Open circuit in cylinder 1 injector wiring Very High
- Faulty cylinder 1 fuel injector (open coil) High
- Disconnected or damaged injector connector High
- Broken ground wire to injector Moderate
- PCM injector driver circuit failure Low
Step-by-Step Diagnostic Procedure
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Measure cylinder 1 injector resistance -- an open reading (OL) confirms a burnt-out injector coil
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Check for power at the injector connector with key on -- if missing, trace the power feed from the fuse
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Verify the PCM ground pulse signal at the injector connector using a noid light -- it should flash during cranking
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Inspect the injector connector for pushed-back pins, corrosion, or melted terminals
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Replace the injector if coil is open; repair wiring if power or ground circuit is broken
Frequently Asked Questions
Can I drive with code P0262?
You can drive short distances, but the engine will misfire on cylinder 1 causing rough running. Prolonged driving can damage the catalytic converter.
What does injector circuit high mean?
It means the PCM detects higher than expected resistance or voltage in the injector circuit, typically caused by an open circuit -- either a broken wire, bad connection, or burnt-out injector coil.
How much does a fuel injector cost?
A single fuel injector typically costs $50-$150 for the part. Many technicians recommend replacing all injectors as a set to maintain balanced fuel delivery, which increases the total cost.