P23D6

Symptoms

• Difficulty starting the engine in cold weather
• Unstable engine operation
• Increased fuel consumption
• Check engine light comes on
• Reduced engine power

Causes

• Short circuit in heater control circuit
• Cylinder 2 fuel heater malfunction
• Damaged wiring or poor contact
• Faulty relay or fuse
• Problems with the engine control unit (ECU)

How to Fix

1. Check the integrity of the fuses and relays of the heater circuit
2. Inspect wiring and connectors for damage
3. Check the resistance of the cylinder 2 fuel heater
4. Check control circuit voltage
5. If necessary, replace the fuel heater or repair the wiring

Related codes

Error P23D6 by Vehicle Brand