Error code

OBD2 P0202

OBD2P0202
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Injector Circuit/Open - Cylinder 2.

Severity

moderateCan drive, but performance issues and potential damage may occur if not addressed.

Summary

P0202 indicates an issue with the fuel injector circuit for cylinder 2, meaning the powertrain control module (PCM) is not seeing the expected electrical signal when commanding the injector to open or close.

Symptoms

  • Engine misfire
  • Engine stalls
  • Cranking but not starting

Common Causes

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

Diagnosis

  1. Visually inspect injectors and connections for any obvious faults.
  2. Check for misfires using a scan tool to identify the affected cylinder.
  3. Use a noid light to test the control circuit of the injector when cranking the engine.
  4. Test power supply to the injector with a test light.
  5. Measure resistance between PCM and injector connector, or check continuity with a multimeter.

Fixes

  • Replace faulty fuel injector or repair wiring issues

FAQ

What does P0202 mean?

P0202 indicates a malfunction in the second fuel injector circuit, where the PCM detects an issue with the electrical signal when commanding the injector to operate.

How do I diagnose P0202?

Diagnose by visually inspecting the injector and connections, checking for misfires using a scan tool, testing the control circuit with a noid light, and measuring resistance or continuity in the wiring.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

More OBD2 codes

All OBD2 codes →Search more codes →