P27A8
Pressure Control Solenoid B Data Incompatible
The calibration data programmed for pressure control solenoid B does not match the format expected by the transmission controller.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Replacement solenoid incompatible with software versionCommon
- Calibration code format does not match controller versionPossible
Parts involved
- Pressure Control Solenoid B
- TCM
P27A8 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.