P23DF

Cylinder 4 Fuel Heater Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–67 (est.)

Symptoms

Difficulty starting the engine in cold weather
Uneven engine operation
Increased fuel consumption
Check Engine Light Illuminates
Reduced engine power

Causes

Malfunction of the 4th cylinder fuel heater
Open or short circuit in control circuit
Poor contact in heater circuit connectors
Engine control module malfunction
Heater relay problems

How to Fix

Check the resistance of the 4th cylinder fuel heater
Inspect the wiring harness and connectors for damage.
Check voltage on heater control circuit
Scan the control module for additional errors
If necessary, replace the fuel heater

Related codes

P23DD P23DE P23E0