P1AF5 GMC 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 GMC 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.
Code P1AF5 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 P1AF5 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 P1AF5 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 P1AF5 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 P1AF5 GMC Code
1. What are the common symptoms of OBDII code P1AF5 in a GMC vehicle?
- Common symptoms include the check engine light being illuminated, reduced hybrid system performance, and potential difficulty starting the vehicle.
2. What does the OBDII code P1AF5 indicate in a GMC vehicle?
- The code P1AF5 indicates a problem with the Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit, specifically a high voltage issue.
3. What are the possible causes of OBDII code P1AF5 in a GMC vehicle?
- Possible causes include a faulty isolation sensor, wiring issues, a malfunctioning control module, or problems with the hybrid battery itself.
4. How can I diagnose the OBDII code P1AF5 in my GMC vehicle?
- Diagnosing code P1AF5 may require using a diagnostic scanner to retrieve the specific error codes, checking the wiring for any visible damage, and testing the isolation sensor and control module for proper functionality.
5. Is it safe to continue driving my GMC vehicle with the OBDII code P1AF5 present?
- It is not recommended to continue driving your vehicle with code P1AF5 present, as it can lead to further damage to the hybrid system and potentially unsafe driving conditions.
6. Can I repair OBDII code P1AF5 in my GMC vehicle myself?
- While some DIY enthusiasts may attempt to repair this code themselves, it is recommended to seek professional help due to the complexity of the hybrid system and the potential safety risks involved.
7. How much does it typically cost to repair OBDII code P1AF5 in a GMC vehicle?
- The cost of repairing code P1AF5 can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.
8. Are there any preventive measures to avoid OBDII code P1AF5 in a GMC vehicle?
- Regular maintenance and inspections of the hybrid system, including checking the isolation sensor and control module, can help prevent issues that may trigger code P1AF5.
9. Will resetting the check engine light make OBDII code P1AF5 disappear in a GMC vehicle?
- Resetting the check engine light will only temporarily clear the code, but if the underlying issue causing code P1AF5 is not fixed, the code is likely to reappear.
10. How long does it take to repair OBDII code P1AF5 in a GMC vehicle?
- The repair time for code P1AF5 can vary depending on the exact cause of the issue, the availability of parts, and the technician's expertise, but it may take a few hours to a full day to complete the repair.
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