P21BD

Cold Start Cylinder 8 Injection Timing

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Unstable engine idling
Increased fuel consumption
Reduced engine power
Difficult cold start
Possible misfire in cylinder 8

Causes

Malfunction of the fuel injector of cylinder 8
Problems in the injector control circuit
Engine control unit malfunction
Fuel system contamination
Incorrect fuel pressure

How to Fix

Check the condition of the fuel injector of cylinder 8
Diagnose the injector control circuit
Check fuel pressure
Clean the fuel system if necessary
Scan the engine control module for other errors

Related codes

P21B9 P21BE P21C0