P1AF0 Saturn Code - Drive Motor 1 Control Module Hybrid/EV Battery Voltage System Isolation Lost
Quick Answer
The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid powertrain control module. Common causes include Faulty Drive Motor 1 Control Module Hybrid/EV Battery, Drive Motor 1 Control Module Hybrid/EV Battery harness is open or shorted, Drive Motor 1 Control Module Hybrid/EV Battery circuit poor electrical connection. 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
- P1AF0 Saturn indicates Drive Motor 1 Control Module Hybrid/EV Battery Voltage System Isolation Lost.
- Common causes
- Common causes include Faulty Drive Motor 1 Control Module Hybrid/EV Battery, Drive Motor 1 Control Module Hybrid/EV Battery harness is open or shorted, Drive Motor 1 Control Module Hybrid/EV Battery circuit poor electrical connection.
- 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 P1AF0 Saturn Description
Motor control modules' loss of isolation is detected through the use of two high-impedance resistors and voltage measuring circuitry. The two resistors are connected in series between the high- voltage positive and high-voltage negative circuits. The centre connection of the two resistors is also connected to vehicle chassis. The motor control module then measures the voltage drop across one of the resistors. Without a loss of isolation, the motor control module 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.
What are the Possible Causes of the DTC P1AF0 Saturn?
- Faulty Drive Motor 1 Control Module Hybrid/EV Battery
- Drive Motor 1 Control Module Hybrid/EV Battery harness is open or shorted
- Drive Motor 1 Control Module Hybrid/EV Battery circuit poor electrical connection
How to Fix the DTC P1AF0 Saturn?
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 P1AF0 Saturn 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 P1AF0 Saturn Code
1. What does the OBDII code P1AF0 mean for a Saturn vehicle?
The P1AF0 code indicates a loss of voltage system isolation within the hybrid or EV battery, often related to the Drive Motor 1 Control Module.
2. What are the common symptoms of the P1AF0 code?
Symptoms may include warning lights on the dashboard, reduced hybrid/electric power performance, or the vehicle entering a limp mode.
3. What causes the P1AF0 code to appear in a Saturn vehicle?
Common causes include damaged wiring, a faulty Drive Motor 1 Control Module, issues with the hybrid battery, or electrical system isolation faults.
4. Can I still drive with the P1AF0 code active?
Driving with this code is not recommended, as it may lead to reduced vehicle performance and potential damage to hybrid system components.
5. How is the P1AF0 code diagnosed?
A mechanic will use a scan tool to read the code and check related systems, inspect wiring and connectors, and test the hybrid battery system for isolation faults.
6. How can the P1AF0 code be repaired?
Repairs may involve replacing damaged wiring, repairing or replacing the hybrid battery, or replacing the Drive Motor 1 Control Module.
7. Can a weak hybrid battery cause the P1AF0 code?
Yes, a weak or damaged hybrid battery can lead to voltage system isolation issues and trigger this code.
8. What tools are needed to fix the P1AF0 code?
Diagnosing and fixing the code typically requires a professional-grade scan tool, multimeter, and possibly specialized equipment for testing the hybrid battery system.
9. How much does it cost to repair the P1AF0 code?
Repair costs vary widely depending on the issue. Simple wiring repairs may cost a few hundred dollars, while hybrid battery or control module replacements can range into the thousands.
10. Can the P1AF0 code be caused by water damage?
Yes, water infiltration into electrical components or connectors can cause voltage isolation issues and trigger the P1AF0 code.
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