P1E93 Cadillac Code - Hybrid/EV Battery Interface Control Module 1 5 V Reference Circuit
Quick Answer
The drive motor battery contains 288 cells. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module circuit poor electrical connection. 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
- P1E93 Cadillac indicates Hybrid/EV Battery Interface Control Module 1 5 V Reference Circuit.
- Common causes
- Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module circuit poor electrical connection.
- 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 P1E93 Cadillac Description
The battery energy control module monitors the voltage of the 96 cell groups. Voltage sense lines are attached to each individual cell group, and these sense lines terminate at a connector located on the top surface of the battery section. A serviceable voltage sense harness joins this connector to a drive motor battery high-voltage interface control module, also located on the top surface of the battery section. The drive motor battery high-voltage interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one drive motor battery high-voltage interface control module located on battery sections one and two, and two drive motor battery high-voltage interface control modules associated with battery section three. The drive motor battery high-voltage interface control module, voltage sense harnesses, battery control harness and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.
What are the Possible Causes of the DTC P1E93 Cadillac?
- Faulty Hybrid/EV Battery Interface Control Module
- Hybrid/EV Battery Interface Control Module harness is open or shorted
- Hybrid/EV Battery Interface Control Module circuit poor electrical connection
How to Fix the DTC P1E93 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 P1E93 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.
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Frequently Asked Questions about P1E93 Cadillac Code
1. What does the OBDII code P1E93 mean for a Cadillac?
P1E93 indicates an issue with the Hybrid/EV Battery Interface Control Module 1's 5V reference circuit, which is critical for proper communication and operation of the vehicle's hybrid or EV systems.
2. What are the symptoms of code P1E93 in a Cadillac?
Common symptoms include a check engine light, reduced power mode, hybrid/EV system warnings, or difficulty operating in electric-only mode.
3. What causes the P1E93 code to appear?
Likely causes include a faulty Hybrid/EV Battery Interface Control Module, damaged wiring or connectors, or a short/open circuit in the 5V reference line.
4. Can I drive my Cadillac with a P1E93 code?
Driving with this code is not recommended as it may result in reduced performance, potential damage to the hybrid/EV battery system, or complete loss of electric drive capability.
5. How is the P1E93 code diagnosed?
A technician will use a scan tool to confirm the code, inspect the 5V reference circuit wiring and connectors, and test the Hybrid/EV Battery Interface Control Module for faults.
6. What repairs are needed to fix the P1E93 code?
Repairs might include replacing damaged wiring, repairing connectors, or replacing the Hybrid/EV Battery Interface Control Module if it is defective.
7. How much does it cost to fix the P1E93 code?
Repair costs vary, but diagnosing and repairing wiring issues may range from $100 to $300, while replacing the control module could cost $500 to $1,500 depending on labor and parts.
8. Can a dead 12V battery cause the P1E93 code?
While unlikely, a weak or dead 12V battery can sometimes cause communication errors that trigger hybrid/EV system codes, so it’s worth testing the 12V battery.
9. How can I prevent the P1E93 code from recurring?
Regularly inspect and maintain the hybrid/EV electrical system, ensuring all wiring, connectors, and control modules are in good condition and free of corrosion or damage.
10. Is the P1E93 code specific to Cadillacs?
While it is most commonly reported in Cadillac hybrid/EV models, similar codes may appear in other GM vehicles with hybrid or EV systems.
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