P281CPressure Control Solenoid H Control Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P281C is meant for a circuit of solenoid H that is electrically intact but does not behave plausibly, for example when the measured current fails to follow the commanded value. No manufacturer documents this code publicly; CARB 13 CCR 1968.2 only demands functional monitoring of output circuits. GM's 2023 Corvette dual-clutch software does run exactly such a test on its H valve, comparing the current estimated from duty cycle and battery voltage with the target, but files a deviation of over 70 % or 200 mA under the high-side code P281E. On the G side, Nissan-built CVTs use the matching code P2813 mainly for a hydraulic engagement fault. If P281C appears, check coil resistance against specification and look for high contact resistance.
- What you may notice
- MIL or transmission warning on
- Shift quality varies from drive to drive
- Possible substitute program
- Likely causes
- LikelyCoil resistance of valve H outside specification
- PossibleCorroded or loose contacts raising circuit resistance
- RareUnstable supply voltage to the solenoid driver
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.