AutoCodes – GMC – P0AAF GMC

P0AAF GMC Code - Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High 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: P0AAF GMC indicates Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High 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 674

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 P0AAF 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 P0AAF GMC - Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage - AutoCodes.com — P0AAF GMC Code - Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0AAF 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 P0AAF 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 P0AAF 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 P0AAF 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 P0AAF GMC Code

1. What are the common symptoms of OBDII code P0AAF related to Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

The common symptoms include decreased fuel efficiency, reduced engine power, and illuminated check engine light.

2. What are the potential causes of OBDII code P0AAF indicating an issue with Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

Possible causes include a faulty air temperature sensor, wiring issues, corrosion in the sensor connector, or issues with the battery pack itself.

3. How can I diagnose the OBDII code P0AAF related to Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

Diagnosis typically involves using a scan tool to read the code, checking the sensor's wiring and connector for damage, and testing the sensor's resistance and voltage output.

4. What are some repair tips for resolving OBDII code P0AAF associated with Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

Repair options may include replacing the air temperature sensor, repairing or replacing damaged wiring, cleaning corrosion from the connector, and ensuring proper connection within the battery pack.

5. Can I continue driving my vehicle with the OBDII code P0AAF indicating an issue with Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid or electric system. It is best to address the issue promptly.

6. How critical is it to address the OBDII code P0AAF related to Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

Addressing this code is important to ensure the proper functioning of the hybrid or electric system, prevent potential damage, and maintain optimal vehicle performance.

7. Is it possible to reset the OBDII code P0AAF without addressing the underlying issue with Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

While clearing the code may temporarily turn off the check engine light, the underlying issue will persist. It is crucial to address the root cause to prevent future problems.

8. Are there any preventive measures to avoid encountering OBDII code P0AAF regarding Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

Regular maintenance checks, including inspecting the sensor and its connections, keeping the battery pack clean and well-maintained, and addressing any warning signs promptly, can help prevent this issue.

9. Can a DIY enthusiast repair OBDII code P0AAF associated with Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

While some basic diagnosis and repairs can be done by a DIY enthusiast, addressing complex issues with the hybrid or electric system may require specialized knowledge and tools. Professional assistance is recommended.

10. How much does it typically cost to repair OBDII code P0AAF related to Hybrid/EV Battery Pack Air Temperature Sensor 1 Circuit High Voltage?

The cost of repair can vary depending on the specific issue, labor rates, and parts needed. Generally, it may range from a few hundred to a thousand dollars, including diagnostics and replacement parts.