P2159Vehicle Speed Sensor B Circuit Range/Performance
- 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
- P2159 means the circuit of speed sensor B is electrically intact, but its signal does not fit: implausible jumps, dropouts or a value that disagrees with other speed sources. Two makers document it. Audi lists P2159 with fault environment code 8099 as a plausibility fault of speed sensor B on the 0B5 S tronic gearbox of the 2010–2014 RS5 and the S4, S5, S6 and S7; together with P0501 (sensor A) and gear selector codes it points to the gearbox-internal sensor module and its circuit board, which has to be replaced after case disassembly. Mitsubishi's 2022 Outlander engine control groups P2159 with P0500/P0501 as vehicle speed sensor faults, detected over two trips and lighting the MIL. P2158 is the pure circuit fault of the same sensor. Expect gearbox warnings, erratic shifting or a speedometer that jumps.
- What you may notice
- Check engine light or gearbox warning on
- Erratic shifting or emergency gearbox mode
- Speedometer jumping
- Likely causes
- LikelyFaulty speed sensor or transmission sensor module (Audi 0B5)
- PossibleDamaged tone ring, wrong air gap or metal debris on the sensor tip
- PossibleIntermittent contact in wiring or connector
- RareWrong tyre size or speed factor configured
- 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.