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 wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0AA8Leak Sensor Detection Circuit
Manufacturer communications
3Original wording in English
POLESTAR
This is a TJ - text only - no attachments - If the vehicle cannot engage any gear, and both DTCs P0AA800 and P127900are present, Confirm that all criteria specified in the "Description" section are fulfilled. follow advice under "Service".
POLESTAR
This is a TJ - text only - no attachments - If the vehicle cannot engage any gear, and both DTCs P0AA800 and P127900are present, Confirm that all criteria specified in the "Description" section are fulfilled. follow advice under "Service".
MITSUBISHI
This is a Technical Service Bulletin sent to dealers, instructing them to reprogram affected vehicles' sub-BMU with updated software. Due to inappropriate programming, the sub-BMU may falsely judge the leak detection circuit as faulty by picking up electrical noises from operation of the drive selector, brake application, or air…
Check vehicle applicability
3A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mitsubishi | OUTLANDER ↗ | 2018 |
| Polestar | POLESTAR 4 ↗ | 2026 |
| Polestar | POLESTAR 4 ↗ | 2025 |
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.