U0121 on Chevrolet Vehicles
Other modules stopped receiving data from the ABS module, so ABS and stability control are off. U0121 →
11Complaints mentioning the code
#1Rank among 10 brands
0.9%Share of Chevrolet DTC complaints
In NHTSA owner complaints we analyzed for Chevrolet, U0121 was mentioned 11 times.
Most mentioned models
| Chevrolet Malibu Eco Eassist | 3 | |
|---|---|---|
| Chevrolet Cobalt | 2 | |
| Chevrolet Colorado | 1 | |
| Chevrolet Cruze | 1 | |
| Chevrolet Equinox | 1 | |
| Chevrolet Malibu | 1 |
Model years mentioned
Components named in these complaints
- Electrical System (6)
- Service Brakes (6)
- Engine (5)
- Steering (3)
- Electronic Stability Control (esc) (2)
Reports with a crash: 1 · fire: 0 · injuries: 0
Often appears together with
P0106
Powertrain
The MAP sensor works electrically, but its pressure reading doesn't fit what the engine…
Low
P0299
Powertrain
The turbo or supercharger isn't building the boost pressure the engine computer is asking for.
Moderate
P0300
Powertrain
The engine computer sees misfires that jump between cylinders or hit several cylinders at once.
High
Possible causes
- Blown ABS fuse or bad power/ground at the ABS module (it usually has a separate high-current feed for the pump motor)
- Corroded or loose ABS module connector from road splash and heat
- Internal ABS module failure, often cracked solder joints on the circuit board
- Damaged CAN wiring between the ABS module and the rest of the network
Related codes
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.