Wheel Speed Sensor Circuit Malfunction (Left Rear)
The left rear wheel speed sensor circuit is reporting a malfunction.
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 left rear wheel speed sensor tells the computer how fast that wheel is turning. If it's broken, the computer won't know if that wheel is spinning properly, which can affect traction control and ABS systems.
What the computer is actually seeing
The ABS control module expects a consistent voltage signal around 0.5 to 2.5 volts from the wheel speed sensor based on wheel rotation. If it sees voltages outside of this range or no signal, it triggers the C0228 code.
What a healthy reading looks like
0.5V to 2.5V signal depends on wheel speed; should match other wheel speeds closely in a normal operation.
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 wiring and connectors at the left rear wheel speed sensor for damage or corrosion. Decision: If damaged, repair or replace the wiring/connector. If okay, proceed to step 2.
- 22. Check the sensor output using a multimeter. Disconnect the sensor and measure voltage while the wheel is turning. Decision: If voltage is within 0.5V to 2.5V, replace the sensor. If no voltage, proceed to step 3.
- 33. Inspect the ABS module's wiring for continuity. Measure the resistance between the sensor connector and the ABS module. Decision: If high resistance (>5 ohms), repair wiring. If resistance is good, suspect a faulty ABS control module.
Common causes
- Faulty left rear wheel speed sensor
- Damaged wiring or connector
- Poor ground connection at the ABS module
- Corroded connector pins
- Wheel bearing issues affecting sensor placement
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
Moderate severity suggests it’s better to fix soon, as ABS and traction control may not work properly.
Will this code come back after clearing it?
If the underlying issue isn't fixed, the code will likely return once the vehicle is operated.
Why is this code showing when other wheel sensors are fine?
This code indicates a specific issue with the left rear wheel sensor or its circuit, independent of the other sensors' functionality.
Working a real vehicle right now?
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