Fuel and air

P0216 — Injection Timing Control Circuit Malfunction

Severity: medium Drive with care, to a shop

What P0216 means

P0216 means the engine control unit detected a problem in the injection timing control circuit, mostly on diesel engines. The ECU normally drives a timing solenoid or valve on the injection pump and checks the result against crankshaft and camshaft position signals. If actual timing doesn't match the target, or the circuit is open or shorted, the code is set.

Symptoms

  • Check Engine light on
  • Rough or uneven idle
  • Reduced power and sluggish acceleration
  • Hesitation or misfire under throttle
  • Hard starting or stalling
  • Higher fuel consumption
  • Knocking or smoke from the exhaust

Possible causes

  1. Faulty injection timing control solenoid or valve
  2. Damaged or corroded wiring and connectors in the circuit
  3. Failed crankshaft or camshaft position sensor
  4. Fuel delivery problems: low pressure, clogged filter, weak pump
  5. Mechanical timing off (stretched or jumped belt or chain)
  6. Faulty injection pump
  7. ECU internal fault or software issue

How to diagnose

  1. Scan all codes and freeze frame data, noting any crank or cam sensor codes
  2. Inspect the timing solenoid wiring and connector for chafing, corrosion and oil contamination
  3. Test solenoid resistance, power and ground per the factory wiring diagram
  4. Compare commanded and actual injection timing in scan tool data
  5. Check crank and cam sensor signals with a scope
  6. Measure fuel pressure and inspect the fuel filter
  7. Verify mechanical timing marks and belt or chain condition
  8. Consider ECU software updates or replacement only after ruling out everything else

Common fixes

  • Repair wiring and replace damaged connectors
  • Replace the injection timing control solenoid or valve
  • Replace the crankshaft or camshaft position sensor
  • Replace the fuel filter and correct fuel delivery faults
  • Correct mechanical timing or replace the belt or chain
  • Reflash or replace the ECU, or repair the injection pump

Questions and answers

What does P0216 mean?

It's a fault in the injection timing control circuit, mainly on diesels. The ECU sees that the timing solenoid or related signals aren't behaving as commanded.

Can I drive with P0216?

Only briefly and carefully to a shop. Wrong injection timing can cause power loss, smoke and stalling, and extended driving may damage the engine.

What should I check first for P0216?

Start with the timing solenoid wiring and connector, then check the crank and cam sensors, fuel pressure and mechanical timing.

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.