P2B0B

Cold Start Cylinder 4 Injection Pulse Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine operation when cold
Increased vibration at startup
Reduced engine power
Increased fuel consumption
Check Engine Light Is On

Causes

Dirty or faulty injector of the 4th cylinder
Problems with the fuel pump or pressure regulator
Injector control circuit malfunction
Dirty fuel filters
Problems with sensors (temperature, oxygen)

How to Fix

Check the condition of the injector of the 4th cylinder
Test the pressure in the fuel system
Check the integrity of the injector control circuit
Clean or replace fuel filters
Check temperature and oxygen sensor readings

Related codes

P0204 P0266 P0171