P21BA

Cold Start Cylinder 5 Injection Timing

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Rough engine idling
Difficulty starting in cold weather
Increased fuel consumption
Power dips during acceleration
Check Engine Light Illuminates

Causes

Malfunction of the fuel injector of cylinder 5
Problems with the wiring harness to the injector
Low fuel pressure
Coolant temperature sensor malfunction
Problems with the engine control unit

How to Fix

Check the resistance and operation of the injector of cylinder 5
Inspect the wiring harness to the injector for damage.
Check the fuel pressure in the system
Check the coolant temperature sensor readings
If necessary, replace the nozzle or repair the wiring

Related codes

P21BB P21BC P21BD