Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
8Original wording in English
BUICK
This Preliminary information communicates the potential for dtc p0494 to be stored in the ECM due to potential software anomaly
BUICK
This Preliminary information describes a condition where engineering is working on a solution to a P0494 DTC stored in the ECM.
GMC
This Preliminary information communicates to the field that water hitting the cooling fans can set a false DTC: P0494 for the 2022-2024 HUMMER EV.
GMC
This Preliminary information communicates to the field that water hitting the cooling fans can set a false DTC: P0494 for the 2022-2023 HUMMER EV.
Check vehicle applicability
39A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | ENCLAVE ↗ | 2021 |
| Buick | ENVISION ↗ | 2026 |
| Buick | ENVISION ↗ | 2021 |
| Cadillac | XT4 ↗ | 2021 |
| Cadillac | XT5 ↗ | 2021 |
| Cadillac | XT5 ↗ | 2020 |
| Cadillac | XT6 ↗ | 2021 |
| Chevrolet | BLAZER ↗ | 2021 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.