P1E33 Buick Code - Auxiliary Transmission Fluid Pump Phase U-V-W Current Sensors Not Plausible
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 Faulty Auxiliary Transmission Fluid Pump, Auxiliary Transmission Fluid Pump harness is open or shorted, Auxiliary Transmission Fluid Pump 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
- P1E33 Buick indicates Auxiliary Transmission Fluid Pump Phase U-V-W Current Sensors Not Plausible.
- Common causes
- Common causes include Faulty Auxiliary Transmission Fluid Pump, Auxiliary Transmission Fluid Pump harness is open or shorted, Auxiliary Transmission Fluid Pump 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 P1E33 Buick 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 P1E33 Buick?
- Faulty Auxiliary Transmission Fluid Pump
- Auxiliary Transmission Fluid Pump harness is open or shorted
- Auxiliary Transmission Fluid Pump circuit poor electrical connection
How to Fix the DTC P1E33 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 P1E33 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 P1E33 Buick Code
1. What does the OBDII code P1E33 mean on a Buick?
P1E33 indicates that the Auxiliary Transmission Fluid Pump Phase U-V-W Current Sensors are reporting implausible or inconsistent values to the vehicle's control module.
2. What are the symptoms of code P1E33?
Common symptoms include illuminated check engine light, erratic shifting, reduced transmission performance, and in some cases, the vehicle may enter limp mode.
3. What causes the P1E33 code to appear?
The code can be caused by faulty current sensors, a malfunctioning auxiliary transmission fluid pump, damaged wiring or connectors, or a failure in the transmission control module (TCM).
4. Can I drive my Buick with a P1E33 code?
Driving with a P1E33 code is not recommended as it may lead to poor transmission performance and could cause further damage if the issue is not addressed.
5. How is the P1E33 code diagnosed?
A technician will use a scan tool to verify the code, inspect the wiring and connectors for damage, test the auxiliary pump and sensors, and check for any related TCM issues.
6. How do I fix the P1E33 code on my Buick?
Repairs may include replacing the faulty current sensors, repairing or replacing damaged wiring, replacing the auxiliary transmission fluid pump, or reprogramming or replacing the TCM if necessary.
7. What is the auxiliary transmission fluid pump's role in my vehicle?
The auxiliary transmission fluid pump helps maintain proper fluid pressure for the transmission, particularly in stop-start systems or during low engine speed conditions.
8. Can a software update resolve the P1E33 code?
In some cases, a software update for the transmission control module may resolve the issue if the problem is related to calibration or programming errors.
9. How much does it cost to repair a P1E33 code?
Repair costs can vary depending on the root cause, but replacing a sensor or repairing wiring may cost $100-$300, while replacing the auxiliary pump or TCM could cost significantly more.
10. What preventative maintenance can help avoid a P1E33 code?
Regular inspection and maintenance of the transmission system, including checking wiring, connectors, and fluid levels, can help prevent issues leading to this code.
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