P1E1D GMC Code - Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 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
- P1E1D GMC indicates Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 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 P1E1D 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 P1E1D 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 P1E1D 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 P1E1D 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 P1E1D GMC Code
1. What are the common symptoms of OBDII code P1E1D in a GMC vehicle?
- Common symptoms include the Check Engine light illuminating, reduced hybrid system performance, issues with the transmission fluid pump, and potential hybrid system malfunctions.
2. What can cause the OBDII code P1E1D to trigger in a GMC vehicle?
- The code may be triggered by a malfunction in the auxiliary transmission fluid pump control module, a fault in the hybrid battery voltage isolation sensor circuit 1, or high voltage issues within the hybrid system.
3. How serious is the OBDII code P1E1D in a GMC vehicle?
- This code should be addressed promptly to avoid potential damage to the hybrid system components and ensure safe operation of the vehicle. Ignoring the issue could lead to further complications and costly repairs.
4. Can I continue driving my GMC vehicle with the OBDII code P1E1D present?
- It is not recommended to drive the vehicle with this code active, as it could lead to unpredictable behavior in the hybrid system and potential safety hazards. It's best to have the issue diagnosed and repaired as soon as possible.
5. How can I diagnose the OBDII code P1E1D in my GMC vehicle?
- Proper diagnosis requires a scan tool capable of reading hybrid system codes, along with a thorough inspection of the auxiliary transmission fluid pump control module, hybrid battery voltage isolation sensor circuit 1, and related components.
6. What are some repair tips for addressing the OBDII code P1E1D in a GMC vehicle?
- Repair tips may include checking the wiring and connections related to the hybrid battery voltage isolation sensor circuit 1, inspecting the auxiliary transmission fluid pump control module for faults, and ensuring proper voltage levels within the hybrid system.
7. Can a DIY enthusiast repair the OBDII code P1E1D in a GMC vehicle?
- Due to the complexity of hybrid system components and potential high voltage hazards, it is recommended to seek professional help for diagnosing and repairing this code to ensure safety and proper functioning of the vehicle.
8. How much does it typically cost to repair the OBDII code P1E1D in a GMC vehicle?
- Repair costs can vary depending on the extent of the issue, the specific components needing attention, and labor rates in your area. It's best to consult a professional technician for an accurate estimate.
9. Is there a way to prevent the OBDII code P1E1D from reoccurring in my GMC vehicle?
- Regular maintenance, including inspections of the hybrid system components, proper care of the transmission fluid pump, and addressing any related issues promptly can help prevent the code from reoccurring.
10. Should I reset the Check Engine light after repairing the OBDII code P1E1D in my GMC vehicle?
- Yes, it is recommended to reset the Check Engine light using a scan tool after repairing the issue to ensure proper monitoring of the vehicle's systems and to verify that the repair was successful.
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