AutoCodes – Chevrolet – P1AF7 Chevrolet

P1AF7 Chevrolet Code - Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage

Quick Answer

The drive motor generator Power Inverter Control Module (PIM) contains two Motor Control Modules (MCMs). Common causes include Reprogram Power Inverter Control Module (PIM), Faulty Power Inverter Control Module (PIM), Power Inverter Control Module (PIM) harness is open or shorted. 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: P1AF7 Chevrolet indicates Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage.
Common causes: Common causes include Reprogram Power Inverter Control Module (PIM), Faulty Power Inverter Control Module (PIM), Power Inverter Control Module (PIM) harness is open or shorted.
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 936

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 Mar 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1AF7 Chevrolet Description

The drive motor generator Power Inverter Control Module (PIM) contains two Motor Control Modules (MCMs). Each MCM measures hybrid battery High Voltage (HV) with several internal sensors. The MCMs test for Loss Ff Isolation (LOI) between either the HV positive circuit or HV negative circuit and vehicle chassis. The MCMs test for isolation when the HV contactor relays are closed. The battery energy control module (BECM) only tests the hybrid battery assembly for HV loss of isolation when the HV contactor relays are open.
MCM LOI is detected through the use of two high-impedance resistors and voltage measuring circuitry. The two resistors are connected in series between the HV positive and HV negative circuits. The center connection of the two resistors is also connected to vehicle chassis. The MCM then measures the voltage drop across one of the resistors. Without a loss of isolation, the MCM should measure about half of the high voltage potential. This is referred to as mid-pack voltage. The Mid-pack voltage value is then doubled by the software and displayed on a scan tool as Motor 1 Isolation Voltage or Motor 2 Isolation Voltage. When a loss of isolation is present, the motor isolation voltage display will indicate voltage that is more or less than actual hybrid battery high voltage. The MCM monitors the LOI voltage measuring circuitry for correct operation.

OBDII Code P1AF7 Chevrolet - Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage - AutoCodes.com — P1AF7 Chevrolet Code - Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1AF7 Chevrolet?

Reprogram Power Inverter Control Module (PIM)
Faulty Power Inverter Control Module (PIM)
Power Inverter Control Module (PIM) harness is open or shorted
Power Inverter Control Module (PIM) circuit poor electrical connection

How to Fix the DTC P1AF7 Chevrolet?

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 P1AF7 Chevrolet 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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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 P1AF7 Chevrolet Code

1. What are the common symptoms of OBDII code P1AF7 in a Chevrolet related to the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage issue?

- Common symptoms may include the Check Engine Light illuminating, decreased fuel efficiency, and potential drivability issues.

2. What could cause the OBDII code P1AF7 to trigger in a Chevrolet indicating an issue with the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage?

- Possible causes could be a faulty isolation sensor, a wiring issue, a malfunctioning drive motor control module, or issues with the hybrid battery voltage system.

3. How can I diagnose the OBDII code P1AF7 in a Chevrolet related to the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage problem?

- Diagnosis typically involves using a diagnostic scanner to read the code, inspecting the isolation sensor and related wiring, and testing the drive motor control module and hybrid battery voltage system.

4. Are there any safety precautions to consider when working on the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage issue in a Chevrolet?

- It is important to follow proper safety procedures when working with high-voltage systems in hybrid vehicles. Ensure the vehicle is powered off and take precautions to avoid electrical shocks.

5. Can I continue driving my Chevrolet with the OBDII code P1AF7 indicating a problem with the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage?

- It is not recommended to continue driving the vehicle with this code present, as it could lead to further damage to the hybrid system. It is best to address the issue promptly.

6. What are some possible repair tips for fixing the OBDII code P1AF7 related to the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage in a Chevrolet?

- Repair tips may include checking and replacing the isolation sensor, inspecting and repairing any damaged wiring, testing and potentially replacing the drive motor control module, and ensuring proper connections in the hybrid battery system.

7. How critical is it to address the OBDII code P1AF7 in a Chevrolet indicating an issue with the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage?

- It is important to address this code promptly to prevent further damage to the hybrid system and ensure the vehicle operates safely and efficiently.

8. Can a DIY enthusiast with automotive knowledge repair the OBDII code P1AF7 related to the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage in a Chevrolet?

- While some aspects of diagnosing and repairing this issue may be within reach for experienced DIY enthusiasts, working on high-voltage systems in hybrid vehicles can be complex and dangerous. Professional assistance is recommended.

9. How much can I expect to pay for repairing the OBDII code P1AF7 in a Chevrolet associated with the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage?

- The cost of repairs can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of any necessary parts. It's advisable to obtain quotes from reputable service centers.

10. Is it necessary to clear the OBDII code P1AF7 after fixing the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage issue in a Chevrolet?

- Yes, it is recommended to clear the code after making the necessary repairs. This will reset the Check Engine Light and allow you to monitor if the issue has been resolved.