AutoCodes – Generic – P1AF6

P1AF6 Code - Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low 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: P1AF6 indicates Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low 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 2,021

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 P1AF6 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 P1AF6 - Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage - AutoCodes.com — P1AF6 Code - Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1AF6?

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 P1AF6?

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 P1AF6 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 P1AF6 code?

Need more information on how to fix the P1AF6 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P1AF6 Buick — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage
P1AF6 Cadillac — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage
P1AF6 Chevrolet — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage
P1AF6 GMC — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage
P1AF6 Saturn — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage

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 P1AF6 Code

1. What are the common symptoms of OBDII code P1AF6 Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage?

- Common symptoms include poor hybrid system performance, reduced fuel efficiency, and potential drivability issues.

2. What can cause the OBDII code P1AF6 to trigger?

- The code P1AF6 is typically triggered by a fault in the hybrid battery voltage isolation sensor circuit, indicating low voltage in the sensor.

3. How serious is the OBDII code P1AF6 Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage?

- While the code itself may not cause immediate safety concerns, it can lead to reduced hybrid system efficiency and performance if left unaddressed.

4. What are some possible repair tips for fixing OBDII code P1AF6?

- Repair tips may include checking the wiring and connections related to the hybrid battery voltage isolation sensor, testing the sensor itself, and ensuring proper voltage levels.

5. Can I drive my vehicle with the OBDII code P1AF6 present?

- It is not recommended to ignore the code P1AF6 as it can affect the performance and efficiency of the hybrid system. It is advisable to address the issue promptly.

6. How can I diagnose the root cause of OBDII code P1AF6 Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage?

- Diagnosing the code may involve using a diagnostic scanner to read the code and further testing the hybrid battery voltage isolation sensor and related components.

7. Are there any specific vehicles known to have frequent issues with code P1AF6?

- Vehicles equipped with hybrid powertrains, such as hybrid electric vehicles (HEVs) or plug-in hybrid electric vehicles (PHEVs), may be more prone to experiencing code P1AF6.

8. Can a DIY enthusiast fix the OBDII code P1AF6 issue at home?

- Depending on the individual's knowledge and skills, some DIY enthusiasts may be able to diagnose and address the code P1AF6 issue at home. However, complex electrical systems may require professional assistance.

9. How much does it cost to repair OBDII code P1AF6 Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage?

- Repair costs for code P1AF6 can vary depending on the underlying cause and the extent of the repairs needed. It is recommended to obtain estimates from qualified mechanics.

10. Will resetting the OBDII system clear the P1AF6 code?

- Resetting the OBDII system may temporarily clear the P1AF6 code, but it is essential to address the root cause of the issue to prevent the code from reoccurring.