CAN network

U0261 — Lost Communication with Wiper Module

Severity: medium Drive with care, to a shop

What U0261 means

U0261 means one of the control units stopped receiving messages from the wiper control module over the vehicle network, usually CAN. Normally the module exchanges data constantly, taking commands from the wiper stalk and rain sensor and reporting its status. When those messages disappear, the unit logs a communication fault and may disable functions that depend on the module.

Symptoms

  • Wipers do not work or stop in a random position
  • Automatic rain-sensing wipe is disabled
  • Washer or some wipe modes unavailable
  • Other warning lamps may come on
  • Other functions tied to the module are unavailable

Possible causes

  1. Failed wiper control module
  2. Open, shorted or chafed CAN bus wiring
  3. Corroded connectors or terminals
  4. Missing power or ground at the module
  5. Rain sensor fault or faulty sensor-to-module link
  6. Another faulty control module loading the bus

How to diagnose

  1. Run a full-vehicle scan to see which modules do not communicate
  2. Look for other U-codes pointing to a wider network problem
  3. Inspect the module connector and harness for moisture, corrosion and chafing
  4. Check fuses, power supply and ground at the module
  5. Measure CAN bus resistance and voltages at the diagnostic connector
  6. Check the rain sensor and its wiring
  7. Disconnect suspect modules one at a time only per a documented procedure

Common fixes

  • Repair or replace damaged CAN wiring
  • Clean terminals or replace a damaged connector
  • Restore the module's power or ground
  • Replace or reprogram the wiper module
  • Replace a faulty module that is loading the bus

Questions and answers

What does U0261 mean?

It means other modules lost communication with the wiper control module on the network. The cause can be the module itself, its wiring or its power supply.

Can I drive with code U0261?

Short trips in dry weather are usually fine, but the wipers may fail. Driving in rain is risky because of poor visibility.

How do I clear U0261?

Clearing the code only helps briefly. Find the cause first, whether wiring, power or the module, or the code will return.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.