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P1AF5 Chevrolet Code - Drive Motor 1 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: P1AF5 Chevrolet indicates Drive Motor 1 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 1,083

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 P1AF5 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 P1AF5 Chevrolet - Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage - AutoCodes.com — P1AF5 Chevrolet Code - Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1AF5 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 P1AF5 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 P1AF5 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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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 P1AF5 Chevrolet Code

1. What are the common symptoms of OBDII code P1AF5 in a Chevrolet related to the Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage issue?

- Common symptoms include the check engine light illuminating, reduced hybrid system performance, and potential issues with the hybrid battery voltage isolation system.

2. What are the possible causes of OBDII code P1AF5 in a Chevrolet related to the Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage issue?

- Possible causes may include a faulty hybrid battery voltage isolation sensor, wiring issues in the circuit, or problems with the drive motor 1 control module.

3. How can I diagnose the OBDII code P1AF5 in a Chevrolet related to the Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage problem?

- Diagnosing this issue typically involves using a diagnostic scanner to read the code, checking the hybrid battery voltage isolation sensor, inspecting the wiring for damage, and testing the drive motor 1 control module.

4. What is the recommended repair approach for OBDII code P1AF5 in a Chevrolet related to the Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage fault?

- The recommended repair approach involves addressing any issues with the hybrid battery voltage isolation sensor, repairing or replacing damaged wiring, and potentially replacing the drive motor 1 control module if necessary.

5. Can I continue driving my Chevrolet with the OBDII code P1AF5 related to the Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage issue?

- It is not recommended to continue driving your Chevrolet with this issue as it can potentially lead to further damage to the hybrid system components. It's best to address the problem promptly.

6. Are there any specific maintenance tips to prevent the occurrence of OBDII code P1AF5 in a Chevrolet related to the Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage problem?

- Regularly inspecting the hybrid system components, checking the condition of wiring harnesses, and following the manufacturer's recommended maintenance schedule can help prevent issues leading to this fault code.

7. Can a DIY enthusiast perform the repairs for OBDII code P1AF5 in a Chevrolet related to the Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage issue?

- While some basic diagnostics can be done by a DIY enthusiast, repairing or replacing components related to this fault code may require specialized tools and knowledge. It's recommended to consult a professional mechanic for complex repairs.