P1E1F GMC 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 GMC 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 GMC 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 GMC?
- 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 GMC?
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 GMC 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 GMC Code
1. What are common symptoms of OBDII code P1E1F in a GMC vehicle?
- Common symptoms include the check engine light illuminating, poor vehicle performance, transmission issues, and potential starting difficulties.
2. What can cause the OBDII code P1E1F in a GMC vehicle to trigger?
- The code can be triggered by issues with the auxiliary transmission fluid pump control module, hybrid battery voltage isolation sensor circuit 2, or high voltage related to the transmission system.
3. How serious is the OBDII code P1E1F in a GMC vehicle?
- This code should be addressed promptly as it can affect the proper functioning of the transmission system in a hybrid vehicle and may lead to further damage if left unresolved.
4. Can I continue driving my GMC vehicle with the OBDII code P1E1F present?
- It is not recommended to continue driving the vehicle with this code present, as it can lead to transmission problems and other potential issues that may impact the vehicle's performance and safety.
5. How can I diagnose and repair the OBDII code P1E1F in my GMC vehicle?
- Diagnosing and repairing this code typically requires advanced diagnostic equipment and expertise. It is recommended to consult a professional mechanic or dealership for proper diagnosis and repair.
6. Are there any DIY tips for addressing the OBDII code P1E1F in a GMC vehicle?
- While DIY repairs are not recommended for this specific code due to its complexity, you can visually inspect wiring and connectors related to the auxiliary transmission fluid pump control module and hybrid battery voltage isolation sensor circuit 2 for any obvious issues.
7. Will resetting the check engine light clear the OBDII code P1E1F in my GMC vehicle?
- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the code.
8. How much does it typically cost to repair the OBDII code P1E1F in a GMC vehicle?
- The cost of repairing this code can vary depending on the extent of the issue and the specific repairs needed. It is recommended to obtain a professional diagnosis to determine the exact cost.
9. Can the OBDII code P1E1F in a GMC vehicle be related to other transmission problems?
- Yes, this code is often related to transmission issues in hybrid vehicles, and addressing it promptly can help prevent further damage to the transmission system.
10. Is the OBDII code P1E1F specific to GMC vehicles only?
- While the specific code may vary, similar issues related to the auxiliary transmission fluid pump control module, hybrid battery voltage isolation sensor circuit 2, and high voltage may be present in other hybrid vehicles as well.
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