AutoCodes – GMC – P0AAE GMC

P0AAE GMC Code - Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The Battery Energy Control Module monitors an inlet air temperature sensor that is located at the inlet of the Hybrid/EV Battery Pack. Common causes include Faulty Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2, Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2 harness is open or shorted, Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0AAE GMC indicates Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit Low Voltage.
Common causes: Common causes include Faulty Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2, Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2 harness is open or shorted, Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 525

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0AAE GMC Description

The Battery Energy Control Module monitors an inlet air temperature sensor that is located at the inlet of the Hybrid/EV Battery Pack. This temperature sensor is a variable resistor that measures the air temperature of the incoming air which is used to heat and cool the Hybrid/EV Battery Sections and the internal electronics of the Starter/Generator Control Module. The Battery Energy Control Module supplies 5 V to the signal circuit and a ground for the low reference circuit. The inlet air temperature sensor resistance changes with temperature of the incoming inlet air. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases. The Starter/Generator Control Module will control the Hybrid/EV Battery Pack Cooling Fan based on the inlet air temperature and hybrid/EV battery temperature sensors.
The Starter/Generator Control Module performs a rationality diagnostic that compares the air Inlet temperature sensor output signal to the average battery temperature of the six battery cell temperature sensors. This diagnostic gets one chance to run during a drive cycle after a specific vehicle off time.

OBDII Code P0AAE GMC - Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit Low Voltage - AutoCodes.com — P0AAE GMC Code - Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0AAE GMC?

Faulty Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2
Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2 harness is open or shorted
Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2 circuit poor electrical connection
Faulty Battery Energy Control Module

How to Fix the DTC P0AAE 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 P0AAE 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.

Need more information about the P0AAE GMC code?

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Need Help with the Code?

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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 P0AAE GMC Code

1. What are the common symptoms of OBDII code P0AAE in a GMC related to the Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit Low Voltage?

The common symptoms include the check engine light coming on, reduced hybrid/EV system performance, and potential issues with battery temperature management.

2. What can cause the Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit to register low voltage in a GMC?

Possible causes include a faulty temperature sensor, damaged wiring or connectors, issues with the battery pack's cooling system, or a problem with the hybrid/EV battery itself.

3. How can I diagnose the cause of the low voltage in the Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit in my GMC?

Diagnosis typically involves using a diagnostic scanner to read the OBDII code, testing the sensor's resistance and voltage, inspecting the wiring and connectors for damage, and checking the battery pack's cooling system.

4. Is it safe to continue driving my GMC with the P0AAE code related to the Hybrid/EV Battery Pack Air Temperature Sensor issue?

It is not recommended to drive the vehicle for an extended period with this code present, as it can lead to further damage to the hybrid/EV system and potentially affect overall vehicle performance.

5. Can I repair the Hybrid/EV Battery Pack Air Temperature Sensor issue in my GMC myself?

While some DIY enthusiasts may attempt to replace the sensor or check the wiring themselves, it is recommended to have a qualified technician diagnose and repair the issue to ensure it is done correctly.

6. How much does it typically cost to repair the Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit Low Voltage issue in a GMC?

The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the sensor, repairing wiring, or addressing issues with the battery pack cooling system. Costs can range from a few hundred to over a thousand dollars.

7. Will resetting the OBDII code P0AAE related to the Hybrid/EV Battery Pack Air Temperature Sensor issue make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear once the system detects the problem again.

8. Can a faulty Hybrid/EV Battery Pack Air Temperature Sensor impact the overall fuel efficiency of my GMC?

Yes, a malfunctioning sensor can affect the efficiency of the hybrid/EV system, potentially leading to decreased fuel economy and overall performance.

9. Are there any preventive maintenance steps I can take to avoid issues with the Hybrid/EV Battery Pack Air Temperature Sensor in my GMC?

Regularly checking and maintaining the hybrid/EV system, including monitoring battery temperature and cooling system performance, can help prevent issues with the temperature sensor and other related components.

10. How long does it typically take to repair the Hybrid/EV Battery Pack Air Temperature Sensor issue in a GMC?

The repair time can vary depending on the exact cause of the problem and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the issue with the sensor and related components.