What does it mean?
P1206 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Fuel Pump Control Module Open Circuit To Fuel Pump .
Symptoms
- Cranks but does not start, or starts and stalls straight away
- No pump prime sound from the tank when the ignition is switched on
- Zero or rapidly falling fuel rail pressure
- Intermittent stalling that is worse over bumps and rough roads
- Check engine lamp on with additional fuel pressure or lean mixture codes
Likely causes
- Broken or corroded wire between the control module and the pump, often near the tank straps or a body pass-through
- Corroded or burnt terminals in the pump flange connector on top of the tank
- Open winding or worn brushes inside the pump motor itself
- Tripped inertia or fuel cut-off switch, or an inline connector that has separated
- Poor pump ground at the flange or at the body stud
- Module output stage no longer able to drive the circuit
How to fix it
- Listen for pump prime and read fuel rail pressure to confirm the pump really is dead
- Back-probe the pump connector at the tank while cranking to see whether supply and drive signal arrive
- Voltage drop test the pump ground path
- Check continuity of both wires from the module connector through to the pump connector
- Inspect the flange connector for melted plastic and corroded pins, a very common source of the open
- If supply and ground reach the pump but it does not run, renew the pump assembly
- If the drive signal never leaves the module and the wiring is proven good, replace the module