P1E1F Cadillac 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 Cadillac 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 Cadillac 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 Cadillac?
- 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 Cadillac?
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 Cadillac 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 P1E1F Cadillac Code
1. What are common symptoms of OBDII code P1E1F in a Cadillac related to the Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 2 High Voltage?
- Common symptoms may include the check engine light illuminating, poor vehicle performance, transmission issues, or hybrid system malfunctions.
2. What are the possible causes of OBDII code P1E1F in a Cadillac?
- The code P1E1F can be triggered by issues such as a faulty hybrid battery voltage isolation sensor, a malfunctioning auxiliary transmission fluid pump control module, wiring problems, or high voltage circuit issues.
3. How serious is OBDII code P1E1F in a Cadillac?
- This code should be addressed promptly as it can lead to drivability issues and potential damage to the hybrid system components if left unresolved.
4. Can driving with OBDII code P1E1F in a Cadillac cause further damage?
- Continuing to drive with this code present can potentially cause further damage to the hybrid system components, so it is recommended to address the issue as soon as possible.
5. How can OBDII code P1E1F in a Cadillac be diagnosed?
- Diagnosis typically involves using a professional OBDII scanner to read the code, followed by further testing to pinpoint the exact cause, such as checking the hybrid battery voltage isolation sensor and related components.
6. What are some repair tips for fixing OBDII code P1E1F in a Cadillac?
- Repair tips may include checking and repairing any damaged wiring, replacing the faulty hybrid battery voltage isolation sensor, or addressing issues with the auxiliary transmission fluid pump control module.
7. Can I reset the OBDII code P1E1F in a Cadillac myself?
- While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.
8. Are there any recalls or technical service bulletins related to OBDII code P1E1F in a Cadillac?
- It is recommended to check with your local Cadillac dealership or refer to online resources for any relevant recalls or technical service bulletins related to this specific OBDII code.
9. How much does it typically cost to repair OBDII code P1E1F in a Cadillac?
- The repair cost can vary depending on the exact cause of the code and the needed repairs, so it is best to consult with a professional mechanic for an accurate estimate.
10. Can OBDII code P1E1F in a Cadillac be fixed at home, or is professional help necessary?
- While some DIY enthusiasts may attempt to diagnose and fix the issue at home, due to the complexity of the hybrid system components involved, it is often recommended to seek professional help for proper diagnosis and repair.
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