P1E1B Chevrolet Code - Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensing Performance
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
- P1E1B Chevrolet indicates Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensing Performance.
- 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 P1E1B Chevrolet 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 P1E1B Chevrolet?
- 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 P1E1B Chevrolet?
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 P1E1B Chevrolet 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 P1E1B Chevrolet Code
1. What are the common symptoms of OBDII code P1E1B in a Chevrolet related to the Auxiliary Transmission Fluid Pump Control Module Hybrid Battery Voltage Isolation Sensing Performance?
The common symptoms include poor hybrid system performance, decreased fuel efficiency, and potential transmission issues.
2. What can cause OBDII code P1E1B in a Chevrolet to trigger?
This code may be triggered by a faulty auxiliary transmission fluid pump control module, issues with the hybrid battery voltage isolation sensing circuit, or a malfunction in the hybrid system components.
3. How can I diagnose the source of OBDII code P1E1B in my Chevrolet?
Diagnosing this code typically involves using an OBDII scanner to retrieve the code, conducting a visual inspection of related components, and testing the auxiliary transmission fluid pump control module and hybrid battery voltage isolation sensing circuit for proper function.
4. Is it safe to continue driving my Chevrolet with OBDII code P1E1B present?
It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the hybrid system components and potentially affect the overall performance of the vehicle.
5. What are some repair tips for resolving OBDII code P1E1B in a Chevrolet?
Repair tips may include checking and repairing any damaged wiring or connections related to the hybrid battery voltage isolation sensing circuit, replacing the auxiliary transmission fluid pump control module if necessary, and ensuring all hybrid system components are functioning correctly.
6. Can OBDII code P1E1B be cleared/reset without fixing the underlying issue in a Chevrolet?
While the code can be cleared/reset using an OBDII scanner, it is important to address the root cause of the issue to prevent the code from reoccurring and to ensure the proper functioning of the hybrid system.
7. How much does it typically cost to repair OBDII code P1E1B in a Chevrolet?
The cost of repairing this code can vary depending on the extent of the issue, the labor rates in your area, and the specific components that need to be repaired or replaced. It is recommended to consult a professional mechanic for an accurate estimate.
8. Are there any recalls or technical service bulletins related to OBDII code P1E1B in Chevrolet vehicles?
It is always a good idea to check with a Chevrolet dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to this specific OBDII code in your vehicle.
9. How can I prevent OBDII code P1E1B from appearing in my Chevrolet in the future?
To prevent this code from appearing in the future, it is important to follow the manufacturer's recommended maintenance schedule for your vehicle, address any warning lights or issues promptly, and have the hybrid system components inspected regularly by a qualified technician.
10. Is it possible to troubleshoot and repair OBDII code P1E1B in a Chevrolet without professional help?
While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing this code may require specialized tools and expertise. It is recommended to seek help from a qualified mechanic to ensure the issue is properly resolved.
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