P1E31 Cadillac Code - Auxiliary Transmission Fluid Pump Phase W Current Sensor Circuit 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
- P1E31 Cadillac indicates Auxiliary Transmission Fluid Pump Phase W Current Sensor Circuit 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 P1E31 Cadillac Description
Each motor control module operates its respective drive motor based upon hybrid powertrain control module commands. Each motor control module controls its respective motor through the sequencing actuation of high-current switching transistors called insulated gate bipolar transistors. Each motor operates utilising 3-phase alternating current AC electricity. Each insulated gate bipolar transistor operates a single phase of the drive motor generator. Each phase is individually identified as U, V and W. Each motor control module monitors the current of each phase in order to detect out of range current conditions.
Because each individual motor's phase circuits are electrically joined together, the phases normally flow about the same amount of current. The motor control module performs a mathematical calculation to verify that the phase current sensors are accurate. If the U-V-W phase current sensors indicate about the same amount of phase current, the sum of the calculation should be near zero. If the U-V-W phase currents are not similar, this DTC will set.
What are the Possible Causes of the DTC P1E31 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 P1E31 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 P1E31 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 P1E31 Cadillac code?
Need more information on how to fix the P1E31 Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1E31 Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1E31 Cadillac Code
1. What are the common symptoms of OBDII code P1E31 in a Cadillac related to the Auxiliary Transmission Fluid Pump Phase W Current Sensor Circuit High Voltage?
- Common symptoms may include illuminated Check Engine Light, transmission shifting issues, and decreased fuel efficiency.
2. What are the possible causes of OBDII code P1E31 in a Cadillac?
- The code P1E31 can be triggered by issues such as a faulty auxiliary transmission fluid pump, damaged wiring or connectors, or a malfunctioning current sensor.
3. How can I diagnose the OBDII code P1E31 in my Cadillac?
- Diagnosing the code P1E31 involves using a professional OBDII scanner to retrieve the specific fault code and then conducting further testing on the auxiliary transmission fluid pump, current sensor, and related components.
4. Can I continue driving my Cadillac with OBDII code P1E31 present?
- It is not recommended to continue driving your Cadillac with the code P1E31 active, as it can lead to further damage to the transmission system and potentially result in more costly repairs.
5. How can I repair OBDII code P1E31 in my Cadillac?
- Repairing the code P1E31 typically involves replacing the faulty auxiliary transmission fluid pump, repairing any damaged wiring or connectors, and resetting the fault code with a diagnostic tool.
6. Are there any DIY tips for fixing OBDII code P1E31 in a Cadillac?
- DIY repairs for the code P1E31 are not recommended due to the complexity of the transmission system. It is best to have a professional mechanic diagnose and repair the issue.
7. How much does it cost to fix OBDII code P1E31 in a Cadillac?
- The cost of fixing the code P1E31 can vary depending on the extent of the damage and the specific repairs needed. It is advisable to get quotes from different mechanics or dealerships for an accurate estimate.
8. Can a faulty current sensor cause OBDII code P1E31 in a Cadillac?
- Yes, a faulty current sensor in the auxiliary transmission fluid pump can trigger the code P1E31 due to inaccurate readings of the voltage levels in the circuit.
9. Will resetting the Check Engine Light resolve OBDII code P1E31 in a Cadillac?
- Resetting the Check Engine Light may temporarily turn off the warning indicator, but it will not fix the underlying issue causing the OBDII code P1E31.
10. How can I prevent OBDII code P1E31 from appearing in my Cadillac in the future?
- Regular maintenance of the transmission system, including checking fluid levels and addressing any unusual symptoms promptly, can help prevent the occurrence of OBDII code P1E31 in your Cadillac.
Discuss the causes and fixes for P1E31 Cadillac OBDII Code
Code P1E31 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.
