Fuel and air

P0205 — Injector Circuit Malfunction, Cylinder 5

Severity: medium Drive with care, to a shop

What P0205 means

The engine control unit fires each fuel injector by switching its circuit to ground, and it monitors current and voltage in that circuit. P0205 sets when the unit sees an open, short or other electrical fault in the cylinder 5 injector circuit. As a result, that cylinder may get the wrong amount of fuel or none at all.

Symptoms

  • Check Engine light on
  • Rough idle
  • Cylinder 5 misfire, often with P0305
  • Hesitation or weak acceleration
  • Worse fuel economy
  • Hard starting
  • Possible fuel smell

Possible causes

  1. Failed cylinder 5 fuel injector (open or shorted coil)
  2. Open or shorted wiring or connector to the injector
  3. Corroded or contaminated terminals, moisture in the connector
  4. Weak power supply or poor ground in the injector circuit
  5. Failed injector driver inside the ECM/PCM
  6. Harness damaged by chafing or rodents

How to diagnose

  1. Read all codes and freeze frame data, and look for P0305 or other injector codes
  2. Inspect the cylinder 5 injector connector and harness for corrosion, damage and tension
  3. Measure injector coil resistance and compare with neighboring injectors and specifications
  4. Check for power and the control signal at the connector with a test light or scope
  5. Test the wire to the ECM for opens and shorts to ground or voltage
  6. Swap the injector with a neighbor: if the code follows, the injector is bad
  7. Review fuel trims and cylinder balance, and check fuel pressure
  8. If wiring and injector are fine, test the ECM driver

Common fixes

  • Replace the cylinder 5 fuel injector
  • Repair the wiring or replace the connector
  • Clean and secure terminals and remove moisture
  • Repair or replace the ECM/PCM if the driver has failed

P0205 on different brands

Ford · manuals
For its 2024-2025 gasoline engine monitor strategy, Ford uses the extended code P0205:92, meaning the cylinder 5 injector circuit is out of its expected range; it describes the detected monitor condition, not a confirmed failed part.

Questions and answers

What does P0205 mean?

It is an electrical fault in the cylinder 5 fuel injector circuit. The cause can be the injector, wiring, connector or the engine computer.

Can I drive with P0205?

Only a short distance until it is repaired. Driving with a misfire can damage the catalytic converter and hurt drivability.

How do I tell an injector from a wiring problem?

Measure the injector resistance and test the wiring to the computer. You can also swap the injector with a neighbor and see whether the code moves.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.