P2160 — Vehicle speed sensor B signal is too low

The vehicle speed sensor B is sending a weak or no signal to the engine control unit. This usually happens due to wiring problems, a faulty sensor, or poor connections. The car’s computer can’t accurately read the vehicle speed, which may affect transmission shifting and ABS functions.

Common causes

The cause is almost always one of a few things. Here they are — P2160 rarely comes from anything outside this list:

• Damaged or corroded wiring to the speed sensor
• Faulty vehicle speed sensor B
• Poor electrical connector contact
• Faulty ABS or transmission control module
• Intermittent sensor signal due to debris or damage

Where to start

In the order a sensible mechanic would work — the cheap checks first, the expensive replacements only after:

1. Inspect and repair wiring and connectors for damage or corrosion
2. Clean sensor and connector contacts
3. Test sensor output with diagnostic tools
4. Replace faulty vehicle speed sensor B if needed
5. Check related control modules if problem persists

That is what holds for P2160 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.