P1E27 Cadillac Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High 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
- P1E27 Cadillac indicates Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage 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 P1E27 Cadillac Description
What are the Possible Causes of the DTC P1E27 Cadillac?
- 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 P1E27 Cadillac?
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 P1E27 Cadillac 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 P1E27 Cadillac code?
Need more information on how to fix the P1E27 Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1E27 Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1E27 Cadillac Code
1. What does the OBDII code P1E27 mean on a Cadillac?
P1E27 indicates an issue with the Auxiliary Transmission Fluid Pump Control Module, specifically related to Hybrid/EV battery system voltage being too high.
2. What are the common symptoms of the P1E27 code?
Symptoms may include a check engine light, transmission performance issues, reduced fuel efficiency, or the vehicle entering limp mode.
3. What causes the P1E27 code on a Cadillac?
Common causes include a faulty auxiliary transmission fluid pump, damaged wiring or connectors, a malfunctioning control module, or issues with the hybrid/EV battery system.
4. Can I drive my Cadillac with the P1E27 code?
Driving with this code is not recommended, as it can lead to potential transmission damage or further issues with the battery system.
5. How is the P1E27 code diagnosed?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the auxiliary transmission fluid pump, checking wiring and connections, and testing the control module and battery system voltage.
6. How do you fix the P1E27 code?
Repairs may include replacing the auxiliary transmission fluid pump, repairing or replacing damaged wiring, reprogramming or replacing the control module, or addressing hybrid/EV battery voltage issues.
7. Is the P1E27 code specific to Cadillac hybrid vehicles?
Yes, this code typically appears on Cadillac hybrid or EV models equipped with an auxiliary transmission fluid pump and a high-voltage battery system.
8. What tools are needed to troubleshoot the P1E27 code?
You’ll need an OBDII scanner, a multimeter for voltage testing, and manufacturer-specific diagnostic tools for hybrid/EV systems.
9. How much does it cost to fix the P1E27 code on a Cadillac?
Repair costs vary but can range from $200 to $1,500, depending on whether the issue is with the pump, wiring, or control module.
10. Can a dead hybrid/EV battery cause the P1E27 code?
A failing or improperly functioning hybrid/EV battery can contribute to this code, especially if it causes abnormal voltage levels.
Discuss the causes and fixes for P1E27 Cadillac OBDII Code
Code P1E27 Cadillac 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.
