P23DF
Cylinder 4 Fuel Heater Control Circuit Low
This code indicates cylinder 4 fuel heater control circuit low. It relates to the turbocharger / supercharger / boost control and may affect performance, emissions, or drivability depending on the exact failure.
Cylinder 4 Fuel Heater Control Circuit Low
Common causes
- medium
Faulty sensor or actuator
The component monitored by this code may be worn, failed, or reading out of range.
Typical part cost: $100-400
- medium
Wiring or connector issue
Corroded, damaged, or loose connections can cause circuit or signal faults.
Typical part cost: $100-400
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P23DF.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for P23DF.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for P23DF.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does P23DF mean?
P23DF means "Cylinder 4 Fuel Heater Control Circuit Low". It is a generic OBD-II code that points to a fault in the turbocharger / supercharger / boost control.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full P23DF diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.