P0202 serious

Injector Circuit Malfunction - Cylinder 2

What does P0202 mean?

The P0202 code means the vehicle's onboard diagnostic system has detected: Injector Circuit Malfunction - Cylinder 2. This is a serious severity code.

Common Symptoms

  • Check Engine Light on
  • Cylinder 2 misfire
  • Rough idle
  • Loss of power
  • Fuel odor

Probable Causes (Ranked by Likelihood)

  • Open or short in cylinder 2 injector wiring Very High
  • Failed cylinder 2 injector High
  • Corroded injector connector High
  • PCM driver failure for cylinder 2 Moderate

Step-by-Step Diagnostic Procedure

  1. Use NOID light on cylinder 2 injector connector while cranking.

  2. Measure cylinder 2 injector resistance.

  3. Check wiring continuity from injector harness to PCM.

  4. Perform injector balance test if scan tool supports it.

Frequently Asked Questions

Can a leaking injector on cylinder 2 cause P0202?

Not directly. P0202 is a circuit fault (wiring or driver issue). A leaking injector would cause a rich condition and possibly P0172 or a misfire code. A failed/open injector can cause both P0202 and P0302.

Explore More Codes

All codes | Browse by vehicle make