P1E27 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 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 Description
What are the Possible Causes of the DTC P1E27?
- 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?
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 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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Get the P1E27 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1E27 Acura — Brake Fluid Pressure Sensor PU Circuit High Voltage
- P1E27 Buick — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High Voltage
- P1E27 Cadillac — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High Voltage
- P1E27 Chevrolet — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High Voltage
- P1E27 GMC — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High Voltage
- P1E27 Honda — Brake Fluid Pressure Sensor PU Circuit High Voltage
- P1E27 Saturn — Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage High Voltage
Frequently Asked Questions about P1E27 Code
1. What does the OBDII code P1E27 mean?
P1E27 indicates an issue where the Auxiliary Transmission Fluid Pump Control Module detects a high voltage in the Hybrid/EV battery system that exceeds the expected range.
2. What are the common symptoms of the P1E27 code?
Symptoms may include the Check Engine Light or Hybrid System Warning Light turning on, erratic transmission performance, reduced fuel efficiency, or limited vehicle performance in hybrid or EV modes.
3. What causes the P1E27 code to appear?
Common causes include a malfunctioning auxiliary transmission fluid pump, a faulty control module, damaged or corroded wiring, or an issue with the hybrid/EV battery pack.
4. Can the P1E27 code be triggered by low transmission fluid?
No, this code specifically relates to high voltage in the hybrid/EV battery system, not the fluid level. However, ensuring proper fluid levels is still critical for overall system performance.
5. How is the P1E27 code diagnosed?
A technician will use a scan tool to retrieve the code, inspect the auxiliary pump and related wiring, test the control module, and measure the voltage levels in the hybrid/EV battery system for abnormalities.
6. Can I drive my car with the P1E27 code?
It’s not recommended, as ignoring the code could lead to further damage to the transmission or hybrid/EV system and result in reduced vehicle performance or safety risks.
7. How do I fix the P1E27 code?
Repairs may include replacing the auxiliary transmission fluid pump, repairing or replacing damaged wiring, updating the control module software, or addressing issues with the hybrid/EV battery system.
8. Is the P1E27 code covered under warranty?
In many cases, hybrid/EV system components may be covered under extended warranties. Check with your manufacturer or dealer for specific warranty details.
9. How much does it cost to repair the P1E27 code?
Repair costs vary depending on the root cause, but they can range from $200 for wiring repairs to over $1,000 for replacing a control module or auxiliary pump.
10. Can a dead 12V battery cause the P1E27 code?
A dead or weak 12V battery is unlikely to directly cause the P1E27 code, but it can affect the vehicle’s electrical systems and should be checked as part of the diagnostic process.
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