P1E1D 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 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 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?
- 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?
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 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 P1E1D code?
Need more information on how to fix the P1E1D code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1E1D code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1E1D Buick — Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 High Voltage
- P1E1D Cadillac — Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 High Voltage
- P1E1D Chevrolet — Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 High Voltage
- P1E1D GMC — Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 High Voltage
- P1E1D Saturn — Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1 High Voltage
Frequently Asked Questions about P1E1D Code
1. What are the common symptoms of OBDII code P1E1D?
- Common symptoms include check engine light illumination, decreased fuel efficiency, transmission issues, and potential drivability problems.
2. What causes the OBDII code P1E1D to trigger?
- The code P1E1D is typically triggered by a malfunction in the Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensor Circuit 1, indicating a high voltage issue.
3. How serious is the OBDII code P1E1D?
- This code should be addressed promptly as it can lead to performance issues and potentially affect the drivability of the vehicle.
4. How can I diagnose the cause of OBDII code P1E1D?
- Diagnosis usually involves using a diagnostic scanner to read the code, checking the relevant components of the transmission fluid pump control module, and testing the voltage isolation sensor circuit.
5. Can I drive my vehicle with the OBDII code P1E1D present?
- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage and potential safety risks.
6. How can I repair OBDII code P1E1D?
- Repair options may include checking and replacing faulty wiring, repairing or replacing the transmission fluid pump control module, and ensuring proper voltage isolation sensor circuit functionality.
7. Is it necessary to visit a mechanic for OBDII code P1E1D repair?
- Due to the complexity of the components involved, it is advisable to seek professional help from a qualified mechanic to diagnose and repair the issue effectively.
8. Are there any preventive measures to avoid OBDII code P1E1D in the future?
- Regular maintenance checks, such as inspecting the transmission system and related components, can help prevent issues that may trigger this code.
9. Can a DIY enthusiast attempt to fix OBDII code P1E1D?
- While basic troubleshooting steps can be taken, addressing the specific components related to this code may require specialized tools and expertise, making it a challenging DIY repair.
10. How much does it typically cost to repair OBDII code P1E1D?
- The cost of repair can vary depending on the extent of the issue, parts needed for replacement, and labor costs, so it's best to consult with a mechanic for an accurate estimate.
Discuss the causes and fixes for P1E1D OBDII Code
Code P1E1D 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.
