AutoCodes – Saturn – B1331 Saturn

B1331 Saturn Code - Upper Right Air Temperature Sensor

Quick Answer

The Instrument Panel Module (IPM) monitors the temperature sensors to maintain the comfort level inside of the vehicle. Common causes include 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. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1331 Saturn indicates Upper Right Air Temperature Sensor.
Common causes: Common causes include 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.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 861

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B1331 Saturn Description

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.

OBDII Code B1331 Saturn - Upper Right Air Temperature Sensor - AutoCodes.com — B1331 Saturn Code - Upper Right Air Temperature Sensor

What does this mean?

What are the Possible Causes of the DTC B1331 Saturn?

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 DTC B1331 Saturn?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1331 Saturn code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1331 Saturn code?

Need more information on how to fix the B1331 Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1331 Saturn code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1331 Saturn Code

What does the OBDII code B1331 mean for a Saturn vehicle?

The B1331 code indicates a problem with the upper right air temperature sensor, which is responsible for measuring the temperature of the air entering the vehicle's cabin.

What symptoms might indicate a B1331 code has been triggered?

Common symptoms include erratic or incorrect temperature readings on the climate control system, poor heating or cooling performance, and possible warning lights on the dashboard.

What could cause the B1331 code to appear?

Possible causes include a faulty upper right air temperature sensor, damaged wiring or connectors, or issues with the climate control module.

How can I diagnose the B1331 code?

Start by checking the upper right air temperature sensor and its wiring for any visible damage. Use a multimeter to test the sensorâ€™s resistance and compare it to the manufacturer's specifications.

Is it necessary to replace the upper right air temperature sensor if I get a B1331 code?

Not necessarily; first, verify that the sensor is indeed faulty. If the wiring and connections are intact, replacing the sensor is likely the appropriate repair.

Can I clear the B1331 code without fixing the issue?

Yes, you can clear the code using an OBDII scanner, but the code will likely reappear if the underlying issue is not resolved.

How much does it typically cost to repair the B1331 code?

Repair costs can vary greatly depending on whether the issue is a simple wiring fix or a sensor replacement; expect to pay anywhere from $50 to $200 for parts and labor.

Are there any specific maintenance tips to prevent B1331 code from occurring?

Regularly inspect and maintain the vehicle's climate control system and wiring harnesses, ensuring that all connections are clean and free from corrosion.

What should I do if Iâ€™m not comfortable diagnosing or repairing the B1331 code myself?

If you're unsure about diagnosing or fixing the issue, itâ€™s best to take your vehicle to a qualified mechanic who can properly assess and repair the problem.