P23CB

Fuel Rail Heater Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Difficulty starting the engine in cold weather
Unstable engine operation in the cold
Check Engine Light Is On
Reduced engine power at low temperatures
The engine may stall in the cold

Causes

Open or short circuit in the heater circuit
Fuel rail heating element malfunction
Problems with the relay or fuse of the heating circuit
Engine control unit malfunction
Corroded contacts or damaged wiring harness

How to Fix

Check the fuse and relay of the heating circuit
Diagnose the resistance of the heating element
Check the integrity of wiring and contacts
Test the control signal from the ECU
If necessary, replace the fuel rail heating element

Related codes

P23CC P23CD P23CE