P23DD

Cylinder 4 Fuel Heater Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Difficulty starting the engine in cold weather
Check Engine Light Is On
Reduced engine power
Increased fuel consumption
Possible misfire in cylinder 4

Causes

Broken wire in the heater circuit
Cylinder 4 fuel heater malfunction
Problems with the relay or circuit fuse
Short circuit in wiring harness
Engine control unit malfunction

How to Fix

Check heater circuit fuses and relays
Inspect the wiring harness for damage
Check fuel heater resistance
Check the voltage at the heater connector
If necessary, replace the fuel heater

Related codes

P23DC P23DE P23DF