Fuel and air

P02C0 — Cylinder 10 Fuel Injector Restricted

Severity: medium Drive with care, to a shop

What P02C0 means

The engine control unit compares the fuel actually delivered by the cylinder 10 injector with what it expects, using fuel trims and oxygen sensor feedback. When that cylinder runs leaner than it should, the ECU sets P02C0. This code appears on engines with ten or more cylinders, such as V10 and V12 designs.

Symptoms

  • Check Engine light on
  • Rough idle
  • Misfire in one cylinder
  • Loss of power and sluggish acceleration
  • Worse fuel economy
  • Hesitation under load

Possible causes

  1. Clogged or restricted cylinder 10 fuel injector
  2. Injector circuit fault: open, short or poor connection
  3. Low fuel pressure or clogged fuel filter
  4. Intake air leak skewing the mixture
  5. Mechanical wear or failure of the injector itself
  6. ECU software error (rare)

How to diagnose

  1. Scan all codes and freeze-frame data, and note any misfire codes
  2. Review short-term and long-term fuel trims for the affected bank
  3. Confirm which cylinder and bank is number 10 for this vehicle
  4. Inspect the injector connector and wiring, and check coil resistance
  5. Listen to the injector with a stethoscope or scope it, and compare it with neighbors
  6. Measure fuel pressure and check the fuel filter condition
  7. Check the intake for air leaks, for example with a smoke machine
  8. Run a cylinder balance or injector flow test

Common fixes

  • Professionally clean or replace the cylinder 10 injector
  • Repair or replace damaged wiring and connectors
  • Replace the fuel filter, and service or replace the fuel pump if pressure is low
  • Fix any intake air leak
  • Update the ECU software if the manufacturer has a relevant bulletin

Questions and answers

What does P02C0 mean?

It means the cylinder 10 injector is delivering less fuel than the engine needs. A clogged injector is the most common cause, but wiring and fuel pressure should be checked too.

Can I drive with P02C0?

Briefly and carefully, yes, but don't wait long. A lean mixture and misfires can damage the catalytic converter and the cylinder.

Will a fuel injector cleaner fix P02C0?

If the injector is only partly dirty, a cleaner may help, but it isn't guaranteed. First rule out wiring faults, low fuel pressure and air leaks.

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.