How is fault code C0037 fixed?

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Scan the ABS module and read the live wheel speed data while you wiggle the harness at the wheel, a fault that flickers as you move the loom points straight at chafed wiring or a duff connector 2. Unplug the left front sensor connector and check it properly for water, green corrosion, bent pins and split rubber seals, this is where the money is on most cars 3. Follow the harness from the wheel hub up to the inner wing and along to the module, looking for rubbed-through insulation or anywhere it's resting against another loom or a metal edge 4. With the connector unplugged, put a multimeter on the supply wire and check whether unexpected battery voltage is sitting there, which confirms a short to power rather than a tired sensor 5. Measure the sensor circuit resistance against the workshop figures, passive sensors usually land somewhere around 1,000 to 2,500 ohms, way out of range means the sensor or its wiring 6. Clear the code and drive it, noting whether it comes back instantly or onl

Left Rear Wheel Speed Sensor

Jump to the fix

Severity

High

Can I keep driving?

Avoid extended driving; visit a service soon.

First step

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Scan the ABS module and read the live wheel speed data while you wiggle the harness at the wheel, a fault that flickers as you move the loom points straight at chafed wiring or a duff connector 2.

CChassis
0Generic code
0Chassis / ABS
37Sequence number

What does it mean?

C0037 is a Chassis (ABS, traction control, steering) fault code. It indicates: Left Front Wheel Speed Sensor Supply Voltage Circuit High . This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

Symptoms

Likely causes

How to fix it

Codes From the Same System

All Fault Codes

Related Similar Codes

This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.