U0109 on Chevrolet Vehicles
The PCM lost contact with the module that controls fuel pump speed; stalling or no-start can follow. U0109 →
4Complaints mentioning the code
#1Rank among 3 brands
0.3%Share of Chevrolet DTC complaints
In NHTSA owner complaints we analyzed for Chevrolet, U0109 was mentioned 4 times.
Notes by brand
Many Chevrolet trucks, SUVs and cars use a network-connected fuel pump flow control module mounted low at the rear, and corrosion or water damage at that module is a common cause of U0109 with stalling or no-start.
Most mentioned models
| Chevrolet Silverado | 2 | |
|---|---|---|
| Chevrolet Camaro | 1 | |
| Chevrolet Cruze | 1 |
Model years mentioned
Components named in these complaints
- Fuel/propulsion System (3)
- Electrical System (3)
- Power Train (1)
Reports with a crash: 1 · fire: 0 · injuries: 0
Possible causes
- Corroded or water-damaged fuel pump module connector from road splash and salt
- Failed fuel pump control module (water intrusion into the housing or internal electronic failure)
- Blown fuse, failed relay or corroded ground near the rear of the vehicle
- Chafed CAN or supply wiring along the frame rail to the rear
Related codes
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.