OBD Guide

B370D

Rain Sensor Mode Control Circuit

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Automatic wipers don't work
  • False alarms of wipers
  • Error message on the dashboard

Causes

  • Open or shorted wiring harness
  • Rain sensor malfunction
  • Sensor power problems
  • Oxidation of contacts
  • Software error in the control unit

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the power supply and ground of the sensor
  3. Clean sensor contacts
  4. Test the rain sensor
  5. Update control unit software
  6. Replace sensor if necessary

Related codes

Error B370D by Vehicle Brand