Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC 23, 27, & 37 - Wheel Speed Sensor Continuity Fault: Notes
Toothed wheel generates a voltage pulse as it moves past sensor. EBCM uses the frequency of these pulses to determine wheel speed. Amount of voltage generated in each pulse depends on wheel speed and air gap between sensor and toothed wheel.
DTC will set when there is a short to battery voltage or open in the affected circuit, or if wheel speed sensor is malfunctioning. Testing occurs with ignition on and vehicle at rest.
If a fault is detected which causes a speed sensor DTC to set, anti-lock braking is disabled and EBCM turns on ANTI-LOCK indicator for remainder of ignition cycle. If failure is intermittent, EBCM will enable system at next ignition cycle and a history DTC will be present.
- Checks for proper resistance of sensor.
- Checks for short to battery voltage in either of the speed sensor circuit wires.
- Checks for open in both speed sensor circuit wires.
- Checks wiring and connectors for intermittents.
- Checks if DTC resets during key-up. If DTC resets, wheel bearing/speed sensor assembly may be causing DTC.
- Checks if DTC 21, 25, or 35 sets during road test.
- DTC 21, 25, or 35 will set with vehicle in motion. DTC 23, 27, or 37 will set with vehicle at rest. If DTC 21, 25, or 35 sets, go to appropriate chart.
- Replace wheel bearing/speed sensor assembly. If DTC resets, EBCM is concluding fault is present when no fault is present.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.