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.
Manufacturer communications
2Original wording in English
MERCEDES-BENZ
Reported code forms P2B8500
Complaint Red cooling system malfunction warning due to overheat. Low engine performance. Check engine light on. Fault codes may be stored: P21814B The cooling system has a malfunction. There is a fault due to…
CADILLAC, CHEVROLET, GMC
Reported code forms P2B85
Customer Satisfaction Program. Certain vehicles, equipped with a gas engine, may have a condition in which the printed circuit board inside of the water pump may have been manufactured incorrectly potentially causing a…
Check vehicle applicability
17A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Cadillac | CT4 | 2021 |
| Cadillac | CT4 | 2020 |
| Cadillac | CT5 | 2021 |
| Cadillac | CT5 | 2020 |
| Chevrolet | SILVERADO 1500 | 2021 |
| Chevrolet | SILVERADO 1500 | 2020 |
| GMC | SIERRA 1500 | 2021 |
| GMC | SIERRA 1500 | 2020 |
| Mercedes-Benz | C 300 | 2024 |
| Mercedes-Benz | C 300 | 2023 |
| Mercedes-Benz | C 300 | 2022 |
| Mercedes-Benz | GLE 350 | 2024 |
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.
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.