P21BF

Cold Start Cylinder 10 Injection Timing

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–78 (est.)

Symptoms

Unstable engine operation when cold
Increased fuel consumption
Power Loss
Difficulty starting in cold weather
Increased emissions of harmful substances

Causes

Cylinder 10 injector malfunction
Problems with injector wiring or connectors
Engine control unit malfunction
Mechanical problems in the fuel supply system
Fuel system contamination

How to Fix

Check the resistance and operation of the injector of cylinder 10
Inspect the injector wiring and connectors
Check control signals from the computer
Clean the fuel system if necessary
Replace faulty injector or other components

Related codes

P21B7 P21B8 P21B9 P21BA