Fuel Heater Control Module Feedback Signal Circuit High

Where it lives

For P23D0, the module sits on the circuit this code reports. The description of P23D0 reports a fault at the module.

Check these first

• A short to voltage on the heater feedback wire
• An open in the heater control module ground
• A failed fuel heater control module
• A corroded feedback connector allowing voltage creep

What to do next

1. Read the fuel heater feedback voltage on a scan tool
2. Test the feedback wire for a short to voltage
3. Check the module ground for an open
4. Inspect the feedback connector for corrosion
5. Replace the fuel heater control module if the wiring tests good
6. Clear the code and retest

Look up another code