P23D0

Fuel Heater Control Module Feedback Signal Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Poor engine performance in cold weather
Increased fuel consumption
Unstable idle
Possible problems starting the engine in cold weather

Causes

Malfunction of the fuel heater control module
Open or short circuit in feedback circuit
Problems with wiring harness or contacts
Engine ECU malfunction
Corrosion or oxidation of contacts

How to Fix

Check the integrity of the feedback circuit
Inspect contacts and connectors for corrosion
Check resistance and voltage in the circuit
Test the heater control module
If necessary, replace the control module

Related codes

P23D1 P23CF P23D2