General Information

P2159 Vehicle Speed Sensor \'B\' Range / Performance (Wheel Speed Sensor)

General Information

Component Location





General Description

The Wheel Speed Sensor (WSS) generates a waveform with a frequency proportional to the speed of the vehicle. The signal generated by the WSS informs the PCM not only if the vehicle speed is low or high but also if the vehicle is or is not moving. The PCM uses this signal to control the fuel injection, ignition timing, transaxle shift scheduling and torque converter clutch scheduling. The WSS signal is also used to detect rough road conditions.

DTC Description

Checking vehicle speed signal every from ABS (or ESC) control every 30 sec. under detecting condition, if an signal is in the detecting condition for more than 20 sec., PCM sets P2159.

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data








Fig. 1) Normal data & waveforms of VSS (from ABS, ESC (ESP) ECU) when vehicle speed is 6 km/h.
Fig. 2) Normal data & waveforms of VSS (from ABS, ESC (ESP) ECU) when vehicle speed is 25 km/h.