Right Front Wheel Speed Sensor Circuit
2018-2018 Lincoln MKX 3.7L V6
The 2018 Lincoln MKX is equipped with a 3.7L V6 engine. Below you'll find detailed c0040 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Malfunction in the right front ABS wheel speed sensor.
Symptoms
- ABS light on
- Traction control light on
- ABS inactive
Common Causes
- Faulty sensor
- Tone ring damage
- Wiring issue
- Wheel bearing failure
Diagnostic Steps
- Test sensor
- Inspect tone ring
- Check wiring
- Check bearing
Repair Notes
Replace sensor. Check bearing and tone ring.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0025LF Wheel Speed Sensor Circuit Intermittent
C0040 on Other Vehicles
Lincoln Aviator
2003-2003 4.6L V8 DOHC
Lincoln Aviator
2004-2004 4.6L V8 DOHC
Lincoln Aviator
2005-2005 4.6L V8 DOHC
Lincoln Aviator
2020-2020 3.0L Twin-Turbo V6
Lincoln Aviator
2020-2020 3.0L V6 Twin Turbo
Lincoln Aviator
2020-2020 3.0L V6 Twin Turbo Hybrid
Lincoln Aviator
2021-2021 3.0L Twin-Turbo V6
Lincoln Aviator
2021-2021 3.0L V6 Twin Turbo
Common Questions
What does code C0040 mean on a 2018-2018 Lincoln MKX?
C0040 stands for "Right Front Wheel Speed Sensor Circuit". Malfunction in the right front ABS wheel speed sensor.
What are the symptoms of C0040 on a Lincoln MKX?
Common symptoms of C0040 include: ABS light on, Traction control light on, ABS inactive.
What causes C0040 on a 2018-2018 Lincoln MKX?
Common causes of C0040 include: Faulty sensor, Tone ring damage, Wiring issue, Wheel bearing failure.
Last updated: March 2026