P1AF7 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 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.
Code P1AF7 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 P1AF7?
- 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?
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 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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Information for Specific Makes
- P1AF7 Buick — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage
- P1AF7 Cadillac — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage
- P1AF7 Chevrolet — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage
- P1AF7 GMC — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage
- P1AF7 Saturn — Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage
Frequently Asked Questions about P1AF7 Code
1. What are the common symptoms of OBDII code P1AF7?
- Common symptoms include reduced hybrid system performance, illuminated check engine light, and potential issues with hybrid battery voltage regulation.
2. What can cause the OBDII code P1AF7 to trigger?
- The code P1AF7 is typically triggered by a high voltage reading in the hybrid battery voltage isolation sensor circuit of Drive Motor 2 Control Module.
3. How serious is the OBDII code P1AF7?
- The code P1AF7 should be addressed promptly to prevent potential damage to the hybrid battery or drive motor. It is recommended not to ignore this issue.
4. What are some possible repair tips for OBDII code P1AF7?
- Check the wiring and connections related to the hybrid battery voltage isolation sensor circuit for any damage or corrosion. Resetting the fault codes and retesting the system after repairs can help diagnose the issue.
5. Can I drive my vehicle with the OBDII code P1AF7 present?
- It is not recommended to drive the vehicle with the code P1AF7 present, as it can lead to further damage to the hybrid system components. It's best to address the issue as soon as possible.
6. How can I diagnose the OBDII code P1AF7 at home?
- You can use an OBDII scanner to read and clear the code P1AF7. Additionally, visually inspecting the wiring and connections related to the hybrid battery voltage isolation sensor circuit can help identify any visible issues.
7. Is it possible to reset the OBDII code P1AF7 without repairing the issue?
- While you can clear the code temporarily by resetting the fault codes, it is crucial to address the underlying problem causing the code P1AF7 to prevent further complications.
8. Can a DIY enthusiast repair the OBDII code P1AF7?
- Repairing the code P1AF7 may require a good understanding of hybrid vehicle systems and access to appropriate tools. It is recommended to consult with a professional or specialized mechanic for accurate diagnosis and repair.
9. Are there any recalls or technical service bulletins related to OBDII code P1AF7?
- It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to the OBDII code P1AF7 to ensure proper information and resolution.
10. How much does it typically cost to repair the OBDII code P1AF7?
- The cost of repairing the code P1AF7 can vary depending on the extent of the issue, parts needed for replacement, and labor charges. It is recommended to obtain estimates from reputable repair shops or dealerships.
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