General Information

Engine Control
P2159 Vehicle 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 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. During rough road conditions, the PCM does not monitor cylinder misfires.

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