Powertrain, generic (extended)

P215A Vehicle Speed - Wheel Speed Correlation

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P215A compares the vehicle speed used by the powertrain with the speed derived from the ABS wheel sensors and sets when the two disagree. Volvo and Mack trucks document it most clearly: with I-Shift or mDRIVE gearboxes the code appears once the difference exceeds 12 km/h (7.5 mph), and the advice is to verify the speed factor and the tyre size stored in the brake controller before testing sensors. A Volvo case traced P215A with throttle dropouts to a loose ABS module ground. GM's 2025 brake module tables use P215A, Type B with MIL after two trips, both when more than two wheel sensor signals look suspect at the same time and when the spread between fastest and slowest wheel exceeds about 52 mph while moving. Speedometer loss, cruise or traction faults follow. P215B and P215C compare against the output shaft.

Likely causes

Tyre size or speed factor not matching the vehicle (common after tyre or axle changes)
Faulty wheel speed sensor or damaged tone ring
Poor ABS module ground or wiring fault in the speed signal path
Fault in the transmission-side vehicle speed source

Symptoms

  • Check engine light on
  • Speedometer dropping out
  • ABS, traction or cruise control warnings, power dropouts

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–600
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

vehicle speed sensorwheel speed sensorabs module

Related codes

P215BP215CP0500P0501P2158P2159

References: static.nhtsa.gov, static.nhtsa.gov, gsi.ext.gm.com.