Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that there is a problem with the electric pump that helps move the transmission fluid. It's like a helper pump isn't working right.
This code indicates that the control circuit for the electric or auxiliary transmission fluid pump has an open circuit, meaning there is a break or disconnection in the wiring or the pump itself is not receiving power.
The P2796 code is triggered when the Powertrain Control Module (PCM) detects an open circuit in the control circuit of the electric or auxiliary transmission fluid pump labeled 'A'. This pump is responsible for maintaining the necessary pressure of the transmission fluid, especially in systems that utilize electric pumps to assist or replace traditional mechanical pumps.
• Check Engine Light illuminated
• Transmission overheating
• Erratic shifting or transmission slipping
• Reduced fuel efficiency
• Faulty electric transmission fluid pump
• Open or shorted wiring in the pump circuit
• Blown fuse or relay related to the pump
• Faulty PCM or transmission control module
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or disconnection.
• Check the fuse and relay associated with the transmission fluid pump.
• Test the electric pump for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty electric transmission fluid pump.
• Replace blown fuses or faulty relays.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools (screwdrivers, pliers)
$200 - $800
Moderate
• Ford Fusion
• Toyota Prius
• Chevrolet Volt
• Regularly inspect and maintain wiring and connectors.
• Ensure transmission fluid is at the correct level and condition.
• Schedule regular vehicle maintenance checks.
Electrical Circuit Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Repairs may be covered under the vehicle's powertrain warranty if applicable.
This code has become more common with the introduction of hybrid and electric vehicles that use electric pumps for transmission fluid circulation.
High – This issue can lead to transmission damage if not addressed promptly.
Driving with this code can lead to unsafe driving conditions and potential legal issues if the vehicle becomes inoperable.
• Vehicle must be running.
• Transmission fluid must be at operating temperature.
The electric transmission fluid pump is typically located near the transmission housing, often accessible from underneath the vehicle.
Q: Can I drive with a P2796 code?
A: It's not recommended to drive with this code as it can lead to transmission damage.
Q: How do I reset the P2796 code?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
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