Error code

OBD2 P0201

OBD2P0201
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Injector Circuit/Open - Cylinder 1.

Severity

highThe vehicle may be drivable but performance will likely suffer and there is a risk of further engine damage.

Summary

P0201 indicates an issue with the fuel injector circuit for cylinder 1, meaning the powertrain control module (PCM) is not receiving expected signals when commanding the injector to operate.

Symptoms

  • Engine misfire
  • Engine stalls
  • Engine cranks but does not start

Common Causes

  • Failed fuel injector in cylinder 1
  • Faulty wiring or connector for the fuel injector circuit of cylinder 1
  • Problem with the PCM (injector driver)

Diagnosis

  1. Visually inspect the fuel injector and its connections for any obvious issues.
  2. Use a scan tool to check for misfire codes (P0301-P0308) which may indicate cylinder-specific problems.
  3. Test the control circuit using a noid light by disconnecting the injector and inserting the light into the connector. The light should flash when cranking the engine.
  4. Check for power to the injector using a test light connected to battery power and ground side of the injector connector.
  5. Verify continuity between the PCM and injector using a digital multimeter set to ohms.
  6. Measure resistance between the two terminals of the fuel injector to check if it is within manufacturer specifications.

Fixes

  • Replace faulty fuel injector or repair wiring/connectors.

FAQ

What does P0201 mean?

P0201 indicates a malfunction in the circuit controlling cylinder 1's fuel injector.

How do I diagnose P0201?

Diagnose by visually inspecting, checking for misfires with a scan tool, testing the control circuit with a noid light and multimeter, and measuring resistance of the fuel injector.

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 →