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Engine-Codes - Generic - B0159

B0159 Code - Ambient Air Temperature Sensor Circuit Range/Performance

Repair Importance Level: 1/3
Repair Difficulty Level: 2/3  What is this?
Table of contents
What does this mean?

|B0159 code possible causes

  • Faulty Ambient Air Temperature Sensor
  • Ambient Air Temperature Sensor harness is open or shorted
  • Ambient Air Temperature Sensor circuit poor electrical connection
  • Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

|How is the B0159 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the cost to diagnose the B0159 code

Labor: 1.0

The cost to diagnose the B0159 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B0159 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What is B0159 code meaning?

The ambient air temperature sensor allows the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the air surrounding the front of the vehicle. The inside air temperature sensor assembly allows the HVAC control module to monitor the temperature of the air inside the passenger compartment. The module applies 5 volts to internal input resistors that are connected to the signal circuits of the air temperature sensors. The module provides ground to the air temperature sensors through the low reference circuits. The HVAC control module monitors the voltage drops across the air temperature sensors and uses the inputs for automatic control calculations. The HVAC control module also uses the ambient air temperature input to calculate the value of the ambient air temperature display. When the air temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the air temperatures are hot, the resistances of the sensors are low and the voltage signals are low.

|Need more information with the B0159 code?

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|B0159 code information for specific makes

  • B0159 BUICK Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 CADILLAC Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 CHEVROLET Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 GMC Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 HUMMER Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 PONTIAC Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 SATURN Ambient Air Temperature Sensor Circuit Range/Performance

|Need help with a B0159 code?

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