Network
generic / SAE
U0109
Lost Communication with Fuel Pump Control Module
The Fuel Pump Control Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. Fuel-delivery control is lost, which can starve the engine of fuel. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 09
Possible causes
- Fuel pump module unpowered (often a fuse or relay) high
- CAN wiring to FPCM broken medium
- Gateway module routing CAN messages incorrectly low
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 80–1500 €
- Estimated time: 1–5 h
- Component: fuel pump control module
- Component: can bus wiring
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012