P21BC

Cold Start Cylinder 7 Injection Timing

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine operation when cold
Difficulty starting at low temperatures
Increased fuel consumption
Engine failures
Check Engine Light Illuminates

Causes

Malfunction of the fuel injector of cylinder 7
Problems with the fuel pump or pressure regulator
Dirty fuel injectors
Coolant temperature sensor malfunction
Problems with the wiring to the cylinder 7 injector

How to Fix

Check the condition and resistance of the injector of cylinder 7
Check the pressure in the fuel system
Clean or replace fuel injectors
Check the operation of the coolant temperature sensor
Check the integrity of the wiring to the injector

Related codes

P21BD P21BB P21BA