AutoCodes – GMC – B1332 GMC

B1332 GMC Code - Lower Left 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 Lower Left Air Temperature Sensor, Lower Left Air Temperature Sensor harness is open or shorted, Lower Left 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: B1332 GMC indicates Lower Left Air Temperature Sensor.
Common causes: Common causes include Faulty Lower Left Air Temperature Sensor, Lower Left Air Temperature Sensor harness is open or shorted, Lower Left 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.

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Code Popularity 736

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
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Code B1332 GMC 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 B1332 GMC - Lower Left Air Temperature Sensor - AutoCodes.com — B1332 GMC Code - Lower Left Air Temperature Sensor

What does this mean?

What are the Possible Causes of the DTC B1332 GMC?

Faulty Lower Left Air Temperature Sensor
Lower Left Air Temperature Sensor harness is open or shorted
Lower Left Air Temperature Sensor circuit poor electrical connection
Faulty Instrument Panel Module (IPM)

How to Fix the DTC B1332 GMC?

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 B1332 GMC 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.

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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 B1332 GMC Code

1. What does the OBDII code B1332 mean on a GMC?

The code B1332 indicates an issue with the lower left air temperature sensor, which monitors the temperature of the air in the HVAC system.

2. What are the symptoms of code B1332 on a GMC vehicle?

Common symptoms include inconsistent cabin temperature, HVAC system not responding correctly, or the climate control system working improperly.

3. What causes the B1332 code to appear in GMC vehicles?

The code may be triggered by a faulty lower left air temperature sensor, damaged wiring, poor electrical connections, or issues with the HVAC control module.

4. Can I drive my GMC with the B1332 code active?

Yes, but you may experience discomfort due to improper climate control functionality. Itâ€™s best to address the issue soon to restore optimal performance.

5. How do I diagnose the B1332 GMC code?

Start by inspecting the lower left air temperature sensor for physical damage, check the wiring and connectors, and use a diagnostic tool to verify sensor readings.

6. How can I fix the B1332 code on my GMC?

Repair or replace the lower left air temperature sensor, fix any damaged wiring or connectors, and clear the code with an OBDII scanner.

7. Where is the lower left air temperature sensor located on a GMC?

It is typically located within the HVAC system, near the airflow ducts or close to the cabin air temperature control components.

8. How much does it cost to fix the B1332 code on a GMC?

Repair costs vary but typically range from $50 to $150 for the sensor replacement, plus labor costs if done professionally.

9. Can a dirty or clogged HVAC system cause the B1332 code?

While unlikely, debris or obstructions in the HVAC system can affect sensor readings, so it's worth inspecting the system during diagnosis.

10. Do I need specialized tools to repair the B1332 code?

Basic tools like screwdrivers and an OBDII scanner are typically sufficient. However, advanced diagnostics may require specialized HVAC testing equipment.