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 wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P2681Engine Coolant Bypass Valve Control Circuit Open (3.6L Only)P2681Engine Coolant Bypass Valve Control Circuit Open(3.6L Only)P2681Engine Coolant Bypass Valve Control Circuit Open (3.6L Only)P2681Engine Coolant Bypass Valve Control Circuit Open(3.6L Only)View all · Manufacturer wording →
Manufacturer communications
22Original wording in English
BENTLEY
Reported code forms P268100
Engine Coolant Bypass Valve Control Fault - DTC P268100 with symptom code 32827 evident in address 00C5. Customer Statement: The customer may report that the Engine Malfunction Indicator Lamp (MIL) is illuminated.
LEXUS
Reported code forms P268111 P268115
Some 2021 model year ES 250 and 2019 – 2021 model year ES 300h and UX 200 vehicles equipped with an A25A-FKS, A25A-FXS, or M20A-FKS engine may exhibit a condition in which an “Engine Maintenance Required” message is…
TOYOTA
Reported code forms P268111 P268115
Some 2018 – 2021 model year Toyota vehicles equipped with an A25A-FKS, A25A-FXS, or M20A-FKS engine may exhibit a condition in which an “Engine Maintenance Required” message is displayed in the Multi-Information Display…
AUDI
Reported code forms P268100
This bulletin provides information when the engine tempearature is too high; DTCs P00B700, P011600; P268100.
AUDI
Reported code forms P268100
This bulletin provides information when the engine tempearature is too high; DTCs P00B700, P011600; P268100.
LEXUS
Reported code forms P268111 P268115
Some 2021 ES 250 and 2019 – 2021 ES 300h and UX 200 model year vehicles equipped with an A25A-FKS, A25A-FXS, or M20A-FKS engine may exhibit a condition in which an “ EngineMaintenance Required” message is displayed in…
Check vehicle applicability
95A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A3 | 2024 |
| Audi | A3 | 2023 |
| Audi | A3 | 2022 |
| Audi | Q5 | 2025 |
| Audi | Q5 | 2024 |
| Audi | Q5 | 2023 |
| Audi | Q5 | 2022 |
| Audi | Q5 | 2021 |
| Audi | Q5 | 2020 |
| Audi | Q5 | 2019 |
| Audi | Q5 | 2018 |
| Audi | Q5 E | 2025 |
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.