OBD Guide

B0159

Ambient Air Temperature Sensor Circuit Range/Performance

Severity
Low
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–56 (est.)

Symptoms

  • Incorrect temperature readings on the climate system display
  • Unstable operation of the climate system
  • Increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Ambient temperature sensor malfunction
  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Wiring harness damage
  • Software failure in ECU

How to Fix

  1. Check the integrity of the ambient temperature sensor
  2. Check the condition of the wiring harness and connectors
  3. Measure the resistance and voltage in the sensor circuit
  4. Replace the sensor if a fault is detected
  5. Clear error codes and check if error is returned

Related codes

Error B0159 by Vehicle Brand