P23CF

Fuel Heater Control Module Feedback Signal Circuit Low

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
Unstable engine operation at idle

Causes

Malfunction of the fuel heater control module
Open or short circuit in feedback circuit
Poor contact in control circuit connectors
Wiring harness damage
Control module power problems

How to Fix

Check the integrity of the control module feedback circuit
Inspect connectors and contacts for corrosion or damage
Check the power and ground of the control module
Test the fuel heater control module
If necessary, replace the control module or repair the wiring

Related codes

P23D0 P23CE P23D1