Left Rear Wheel Speed Sensor Circuit Range/Performance Problem
Indicates a problem with the left rear wheel speed sensor's performance.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer isn't getting the expected signal from the left rear wheel speed sensor, meaning it thinks there's something wrong with how fast that wheel is turning compared to the others.
What the computer is actually seeing
The Engine Control Module (ECM) expects a voltage signal between 0.5 to 2.5 volts from the wheel speed sensor when the wheel is turning. If the voltage is outside this range or inconsistent, it triggers the B0007 code.
What a healthy reading looks like
When the vehicle is in motion, the sensor should provide a voltage that varies from 0 to 5 volts depending on the wheel speed; at a standstill, it should remain close to 0 volts.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the left rear wheel speed sensor connector for damage or corrosion. Fix as needed.
- 22. Check wiring from the sensor to the ECM for continuity with a multimeter. Expected resistance should be below 5 ohms.
- 33. Test the sensor output by back-probing the connector while the vehicle moves. Expected signal is between 0.5 to 2.5 volts. If outside this range, replace the sensor.
- 44. If the sensor is OK, check the ECM. Look for software updates or known issues related to B0007.
Common causes
- Faulty left rear wheel speed sensor
- Damaged wiring or connector
- Corrosion at connector
- Faulty ECM
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You can drive, but be cautious as braking performance can be affected. Fix it as soon as possible.
What happens if I ignore this code?
Ignoring it may lead to uneven braking or ABS failure, increasing safety risks.
Will the light come back if I clear it?
If the underlying issue isn't fixed, the code will likely return after clearing.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →