P2158
Vehicle Speed Sensor B Circuit
A general electrical fault is reported on vehicle speed sensor B — second VSS used either at the transmission output or as redundancy. Open, short, or implausible signal.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor failedCommon
- Harness faultPossible
Parts involved
- Vehicle Speed Sensor B
P2158 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.