Engine-Codes - Saturn - B1331 SATURN

B1331 SATURN Code - Upper Right Air Temperature Sensor

- Code Popularity: 541 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the B1331 SATURN Code?

  • Faulty Upper Right Air Temperature Sensor
  • Upper Right Air Temperature Sensor harness is open or shorted
  • Upper Right Air Temperature Sensor circuit poor electrical connection
  • Faulty Instrument Panel Module (IPM)

|How to Fix the B1331 SATURN Code?

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 B1331 SATURN code?

Labor: 1.0

The cost to diagnose the B1331 SATURN 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 B1331 SATURN code possible symptoms?

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

|What Does the B1331 SATURN Code Mean?

The Instrument Panel Module (IPM) monitors the temperature sensors to maintain the comfort level inside of the vehicle. The temperature sensors are a 2 wire negative temperature co-efficient thermistor. The IPM applies 5 volts to internal input resistors that are connected to the signal circuits of the air temperature sensors. The IPM provides the ground to the air temperature sensors through the low reference circuit. The IPM monitors the voltage drop across the air temperature sensors and uses the inputs for automatic control calculations. When the air temperatures are cold, the resistance of the sensors are high and the voltage signals are high. When the air temperatures are hot, the resistance of the sensors are low and the voltage signals are low. The IPM converts the voltage values to count values where one volt is approximately equal to 51 counts.

Upper Right Air Temperature Sensor

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