P23D9

Cylinder 3 Fuel Heater Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$9–39 (est.)

Symptoms

Difficulty starting the engine in cold weather
Unstable engine operation after starting
Power Loss
Increased fuel consumption

Causes

Broken heater control circuit wires
Faulty relay or fuse
Damaged heating element
Problems with the engine control unit (ECU)

How to Fix

Check the integrity of the heater control circuit
Check heater circuit fuses and relays
Test the heating element for resistance
Check connections and connectors in the circuit

Related codes

P23D8 P23DA P23DB