What it means
The calibration data programmed for pressure control solenoid A does not match the format expected by the transmission controller. Replacement solenoid uses a different part number or calibration format.
At a glance
- Usually lights the check-engine light
How it works
Pressure control solenoid A regulates transmission hydraulic pressure in response to commands from the TCM. This code sets when the calibration data associated with solenoid A does not match the format or version the TCM expects, so the controller may not apply the intended pressure control.
Common causes
Most likely first.
- Replacement solenoid incompatible with software version
- Calibration code format does not match controller version
Symptoms
- Check engine or transmission warning light may be on
- Harsh, delayed, or erratic shifting
- Transmission may enter a limited operating mode
How to diagnose it
- Record freeze-frame data and check for other transmission codes, noting whether the fault appeared after solenoid or transmission work.
- Confirm that the replacement solenoid is specifically compatible with the vehicle's transmission and TCM software version.
- Read the calibration data associated with pressure control solenoid A and compare its format with the TCM's requirements.
- Check service records and installation details to verify that solenoid A's calibration was entered or programmed correctly.
- If the solenoid data is correct, check for applicable TCM software updates or calibration requirements using vehicle-specific service information.
Common fixes
- Enter the correct calibration data for pressure control solenoid A.
- Replace an incompatible solenoid A with one that matches the transmission and TCM version.
- Correct the calibration format or programming procedure for solenoid A.
- Update or reprogram the TCM if vehicle-specific service information calls for it.
Can I keep driving?
Limit driving if shifts are harsh, delayed, or erratic, or if the transmission enters a limited mode, since incorrect pressure control can contribute to transmission wear. If symptoms are severe or the vehicle cannot shift predictably, stop driving and arrange service.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.