P1E1F Saturn Code - Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 2 High Voltage
Quick Answer
The power inverter module, also called the drive motor generator power inverter module, contains three motor control modules and the hybrid powertrain control module. Common causes include Program Power Inverter Module, Faulty Power Inverter Module, Power Inverter Module 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
- P1E1F Saturn indicates Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 2 High Voltage.
- Common causes
- Common causes include Program Power Inverter Module, Faulty Power Inverter Module, Power Inverter Module 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 P1E1F Saturn Description
Each motor control module measures hybrid battery high voltage with several internal sensors. The motor control modules test for loss of isolation between either the high-voltage positive circuit or high-voltage negative circuit and vehicle chassis. The motor control modules test for isolation when the high-voltage contactor relays are closed. The hybrid powertrain control module 2 only tests the hybrid battery assembly for high-voltage loss of isolation when the high-voltage contactor relays are open.
Motor control module 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, Motor 2 Isolation Voltage or Auxiliary Transmission Fluid Pump 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 motor control module monitors the loss of isolation voltage measuring circuitry for correct operation.
What are the Possible Causes of the DTC P1E1F Saturn?
- Program Power Inverter Module
- Faulty Power Inverter Module
- Power Inverter Module harness is open or shorted
- Power Inverter Module circuit poor electrical connection
How to Fix the DTC P1E1F 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 P1E1F 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.
Need more information about the P1E1F Saturn code?
Need more information on how to fix the P1E1F Saturn code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1E1F Saturn code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1E1F Saturn Code
1. What does the OBDII code P1E1F mean on a Saturn vehicle?
P1E1F indicates an issue with the Auxiliary Transmission Fluid Pump Control Module, specifically related to the Hybrid Battery Voltage Isolation Sensor Circuit 2 detecting high voltage.
2. What are common symptoms of the P1E1F code?
Common symptoms include reduced vehicle performance, warning lights on the dashboard, transmission overheating, or the vehicle failing to switch between electric and gas modes properly.
3. What causes the P1E1F code to appear?
Potential causes include a faulty hybrid battery voltage isolation sensor, damaged wiring or connectors, a malfunctioning auxiliary transmission fluid pump, or an issue with the control module itself.
4. Can you drive with a P1E1F code?
It is not recommended to drive with this code as it may indicate a high-voltage issue that could lead to further damage or unsafe operating conditions.
5. How do you diagnose the P1E1F code?
Diagnosis involves using an advanced scan tool to check for related codes, inspecting the wiring and connectors for damage, and testing the hybrid battery voltage isolation sensor and auxiliary transmission fluid pump.
6. How is the P1E1F code typically fixed?
Repairs may include replacing the faulty hybrid battery voltage isolation sensor, repairing or replacing damaged wiring, or recalibrating or replacing the auxiliary transmission fluid pump control module.
7. Could a weak hybrid battery cause the P1E1F code?
Yes, a weak or failing hybrid battery can cause voltage irregularities that may trigger the P1E1F code.
8. How much does it cost to fix the P1E1F code?
Repair costs vary depending on the root cause but can range from $200 to $1,500 or more, depending on whether the issue is with sensors, wiring, or the control module.
9. Can a software update resolve the P1E1F code?
In some cases, a software update for the vehicle’s control module may resolve the issue if it is related to incorrect programming or calibration.
10. Is the P1E1F code specific to hybrid Saturn vehicles?
Yes, this code typically applies to hybrid Saturn vehicles equipped with an auxiliary transmission fluid pump and high-voltage hybrid battery systems.
Discuss the causes and fixes for P1E1F Saturn OBDII Code
Code P1E1F Saturn comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
