P1E28 Buick Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage
Quick Answer
The power inverter module, often referred to as 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
- P1E28 Buick indicates Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System 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 P1E28 Buick Description
What are the Possible Causes of the DTC P1E28 Buick?
- 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 P1E28 Buick?
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 P1E28 Buick 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 P1E28 Buick Code
1. What does the OBDII code P1E28 mean in a Buick?
P1E28 indicates an issue with the Auxiliary Transmission Fluid Pump Control Module and Hybrid/EV battery system voltage, suggesting voltage irregularities or communication problems.
2. What are the common symptoms of the P1E28 code?
Symptoms may include the check engine light turning on, reduced vehicle performance, erratic shifting, or the hybrid/EV system entering limp mode.
3. What causes the P1E28 code to appear?
Common causes include a faulty auxiliary transmission fluid pump, wiring or connection issues, a malfunctioning control module, or low voltage from the hybrid/EV battery.
4. Can I continue driving with the P1E28 code active?
It is not recommended. Driving with this code can lead to reduced performance, potential transmission damage, or further strain on the hybrid/EV battery system.
5. How is the P1E28 code diagnosed?
A mechanic will use a scan tool to confirm the code, inspect the auxiliary pump, check wiring and connectors for damage, and test the hybrid/EV battery system voltage.
6. What repairs can fix the P1E28 code?
Repairs may include replacing the auxiliary transmission fluid pump, repairing damaged wiring or connectors, reprogramming the control module, or addressing hybrid/EV battery issues.
7. Can a weak hybrid/EV battery trigger the P1E28 code?
Yes, a weak or failing hybrid/EV battery can cause voltage irregularities, triggering this code.
8. How much does it cost to repair a P1E28 code?
Repair costs vary depending on the specific issue, but they can range from $200 for simple wiring repairs to over $1,000 for pump or battery replacements.
9. What tools are needed to troubleshoot the P1E28 code?
Essential tools include an OBDII scanner, a multimeter to test voltage, and wiring diagrams specific to the vehicle.
10. Can the P1E28 code be cleared without repairs?
The code may temporarily clear, but if the underlying issue isn’t fixed, it will likely return and potentially worsen.
Discuss the causes and fixes for P1E28 Buick OBDII Code
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