P1AF6 GMC 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 GMC 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.
Code P1AF6 GMC Description
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.
What are the Possible Causes of the DTC P1AF6 GMC?
- 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 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 P1AF6 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.
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Frequently Asked Questions about P1AF6 GMC Code
1. What are the common symptoms of OBDII code P1AF6 in a GMC vehicle?
- Common symptoms include a Check Engine light, reduced hybrid system performance, and potential difficulty starting the vehicle.
2. What does the OBDII code P1AF6 indicate in a GMC vehicle?
- The code P1AF6 indicates a problem with the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit showing low voltage.
3. What are some possible causes of OBDII code P1AF6 in a GMC vehicle?
- Possible causes include a faulty isolation sensor, issues with the control module, wiring or connector problems, or a low hybrid battery voltage.
4. How can I diagnose the OBDII code P1AF6 in my GMC vehicle?
- Diagnosing the code may involve using a diagnostic scanner to read the code, checking the voltage of the hybrid battery, inspecting wiring and connectors, and testing the isolation sensor.
5. Can I drive my GMC vehicle with the OBDII code P1AF6 present?
- It is not recommended to drive the vehicle with the code P1AF6 as it may lead to further damage to the hybrid system components.
6. How can I repair OBDII code P1AF6 in my GMC vehicle?
- Repairing the code may involve replacing the faulty isolation sensor, repairing wiring or connector issues, resetting the code, and testing the system for proper operation.
7. Is it possible to clear the OBDII code P1AF6 in a GMC vehicle without fixing the underlying issue?
- Clearing the code without addressing the root cause may temporarily turn off the Check Engine light, but the issue will likely reoccur if not properly repaired.
8. How much does it typically cost to fix OBDII code P1AF6 in a GMC vehicle?
- The cost of fixing the code can vary depending on the exact cause of the issue, but it may involve a few hundred dollars for parts and labor.
9. Can I prevent OBDII code P1AF6 from appearing in my GMC vehicle?
- Regular maintenance and inspections of the hybrid system components can help prevent issues that may trigger the code P1AF6.
10. How long does it take to repair OBDII code P1AF6 in a GMC vehicle?
- The repair time can vary depending on the specific issue causing the code, but it may take a few hours to a full day for diagnosis and repair.
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