U0231

Lost Communication with Rain Sensor Module

Moderate severity

The wiper controller has lost the rain/light sensor module. Automatic wiping and automatic headlight switching stop working; the driver has to operate them manually.

Common causes

Rain sensor failed
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $40-280
LIN wire to sensor open
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $40-280
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does U0231 mean?

U0231 means "Lost Communication with Rain Sensor Module". It is a generic OBD-II code that points to a fault in the network / communication.

What are the most common causes of U0231?

rain sensor failed; lin wire to sensor open; gateway module routing can messages incorrectly — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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