Fuel and air

P0210 — Cylinder 10 Injector Circuit Open or Faulty

Severity: medium Drive with care, to a shop

What P0210 means

P0210 means the engine control module detected an electrical fault in the cylinder 10 fuel injector circuit, such as an open circuit, a short, or abnormal voltage. The module normally powers the injector and switches it to ground through a driver to deliver a precise amount of fuel. When the current doesn't match what it expects, the cylinder may stop firing properly and the code is stored.

Symptoms

  • Check Engine light on
  • Rough idle or misfire on cylinder 10
  • Loss of power and sluggish acceleration
  • Worse fuel economy
  • Engine vibration at idle or under load
  • Possible hesitation when accelerating

Possible causes

  1. Failed cylinder 10 fuel injector (open or shorted coil)
  2. Open or shorted wiring in the injector harness
  3. Damaged or corroded injector connector
  4. Failed injector driver inside the ECM/PCM
  5. Poor power or ground connection in the circuit

How to diagnose

  1. Scan all codes and freeze-frame data and note any other injector codes
  2. Inspect the cylinder 10 injector connector and harness for corrosion, chafing and loose pins
  3. Measure injector coil resistance and compare it to the manufacturer's spec
  4. Check for power and a control signal at the connector with a noid light or scope
  5. Test the wire from the injector to the ECM for opens and shorts to ground or voltage
  6. Swap the injector with a neighboring cylinder and see if the fault follows it
  7. If the injector and wiring are good, test the ECM driver

Common fixes

  • Replace the faulty cylinder 10 injector
  • Repair the harness or replace the damaged connector
  • Restore the power or ground connection
  • Repair or replace the ECM if the driver is confirmed faulty

P0210 on different brands

Ford · manuals
Ford documents an extended P0210:0A format on 2024-2025 gasoline engines, indicating an open or short condition found by the monitor rather than a confirmed failed part.

Questions and answers

What does P0210 mean?

The engine computer found a problem in the electrical circuit of the cylinder 10 fuel injector, most often an open circuit. The cause can be the injector, wiring, connector or, less often, the ECM.

Can I drive with a P0210 code?

Only a short distance at light load to get to a shop. Misfires from the dead cylinder hurt performance and can damage the catalytic converter.

Should I replace the injector right away?

No. Check the connector, wiring and injector resistance first. Replace the injector only if it tests bad.

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.