C0045 — Left Rear Wheel Speed Sensor Circuit
Category: Chassis Severity: High
Updated:
DTC code C0045 means: Left Rear Wheel Speed Sensor Circuit. It falls under the "Chassis" category, with an estimated severity of High. Common causes include failed wheel speed sensor, broken or chafed wire and rusted or damaged tone ring; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Failed wheel speed sensor
- Broken or chafed wire
- Rusted or damaged tone ring
- Loose bearing
Symptoms
- ABS and stability lights
- ABS disabled
- Electric parking brake warning (some models)
How to diagnose it step by step
- Compare wheel speeds.
- Inspect wire and connector.
- Clean or inspect the tone ring.
- Replace the sensor.
How to fix it
Check the left rear sensor and its wire; on many cars the rear tone ring rusts and gives erratic readings.
Estimated repair cost
$80–220 installed.
Frequently asked questions
What does DTC code C0045 mean?
Left Rear Wheel Speed Sensor Circuit.
Is code C0045 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code C0045?
Carefully, without ABS.
Related codes
Refine by car make
🛒 Buy ABS sensor at Autodoc (affiliate link)