Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's transmission fluid pump isn't spinning fast enough, which can cause problems with how the car changes gears.
The transmission fluid pump is responsible for circulating fluid in the transmission. If it's not spinning fast enough, it can't do its job properly.
The P28EE code indicates that the electric or auxiliary transmission fluid pump labeled 'B' is operating at a speed lower than expected. This can affect the hydraulic pressure and fluid flow necessary for proper transmission function.
• Transmission slipping
• Harsh or delayed shifting
• Illuminated check engine light
• Faulty transmission fluid pump
• Electrical issues such as poor wiring or connections
• Malfunctioning control module
Transmission: A system in a vehicle that transmits power from the engine to the wheels.
Pump: A device that moves fluids by mechanical action.
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connections to the pump
• Test the pump's electrical circuit and replace if faulty
• Replace the faulty transmission fluid pump
• Repair or replace damaged wiring or connectors
• Reprogram or replace the control module if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$300 - $800
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regular maintenance of transmission fluid
• Check electrical connections periodically
• Avoid overloading the vehicle
Transmission Performance
• Avoid driving the vehicle until repaired to prevent further damage
• Consult with a professional mechanic for an accurate diagnosis
Check with the vehicle manufacturer for warranty coverage on transmission components.
This code has been reported in vehicles with electric or auxiliary transmission fluid pumps, often due to electrical issues.
High – Driving with this issue can lead to severe transmission damage.
Operating a vehicle with a malfunctioning transmission can be dangerous and may violate vehicle safety standards.
• Vehicle must be running
• Transmission in drive mode
The electric/auxiliary transmission fluid pump is typically located near the transmission housing.
Q: Can I drive my car with a P28EE code?
A: It's not recommended as it can cause further damage to the transmission.
Q: How can I prevent this issue?
A: Regular maintenance and ensuring good electrical connections can help prevent this problem.
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