P215COutput Shaft Speed - Wheel Speed Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P215C compares the transmission output shaft speed with the output speed calculated back from the wheel sensors. Unlike P215B it does not judge the final vehicle speed but the agreement between these two measured sources. GM's 2019 hybrid tables set it as Type B, MIL after two trips, when the output shaft and the average from wheel and motor speeds differ by more than 50 or 60 rpm for 0.23 s. FCA uses the code widely: bulletin 21-031-14 updated the TCM of the 2014 Charger and 300 AWD with the 845RE gearbox because P215C set during braking, 21-022-23 reprograms the 2023 Charger 8HP50 for the same code, and on the 2014–2017 Jeep Cherokee a broken power transfer unit input spline produces P215C with P1720 and grinding noises, covered by a warranty extension. Shift quality or AWD functions may suffer.
- What you may notice
- Check engine light on
- Harsh or irregular shifting
- Grinding noise or loss of all-wheel drive (transfer unit damage)
- Likely causes
- LikelyTransmission control software too sensitive, for example under braking (FCA bulletins)
- PossibleMechanical driveline fault such as a broken transfer unit spline (Jeep Cherokee)
- PossibleFaulty output shaft speed sensor or wiring
- RareFaulty wheel speed sensor or mismatched tyre sizes
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · 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.