P1AF6 Buick 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 Buick 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 Buick 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 Buick?
- 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 Buick?
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 Buick 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 Buick Code
1. What does the OBDII code P1AF6 mean on a Buick?
P1AF6 indicates an issue with the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit, specifically a low voltage condition.
2. What are the common symptoms of code P1AF6 on a Buick?
Symptoms may include an illuminated check engine light, reduced hybrid system performance, limited power mode, or failure of the vehicle to switch between gas and electric modes.
3. What causes the P1AF6 code to appear on a Buick?
Possible causes include a faulty Drive Motor 2 Control Module, damaged wiring or connectors, a defective hybrid battery voltage isolation sensor, or low voltage in the hybrid battery system.
4. How can I diagnose the P1AF6 code on my Buick?
Diagnosis involves checking the wiring and connectors for damage, testing the hybrid battery voltage isolation sensor, and scanning for related codes to identify potential underlying issues.
5. Can I drive my Buick with the P1AF6 code?
It is not recommended to drive with this code active, as it may result in reduced performance or further damage to the hybrid system.
6. How is the P1AF6 code typically fixed?
Repairs may include replacing the Drive Motor 2 Control Module, repairing or replacing damaged wiring, or replacing the hybrid battery voltage isolation sensor.
7. How much does it cost to fix the P1AF6 code on a Buick?
Repair costs vary, but replacing a faulty control module or sensor can range from $300 to $1,500, depending on parts and labor.
8. Can a low hybrid battery cause the P1AF6 code?
Yes, a low or malfunctioning hybrid battery can contribute to this code by causing voltage irregularities in the affected circuit.
9. Does the P1AF6 code require reprogramming after repairs?
In some cases, reprogramming or recalibrating the Drive Motor 2 Control Module may be necessary after repairs to clear the code and restore proper function.
10. Can I fix the P1AF6 code on my Buick myself?
If you're experienced with hybrid systems, you can inspect wiring and connectors, but advanced repairs like module replacement or sensor testing typically require professional tools and expertise.
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