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 a part of the car that helps change gears is getting too hot or using too much power. It's like when a toy gets too hot because it's been running for too long.
The shift motor driver is responsible for controlling the shift motor, which helps change gears in the transmission. This code indicates that the current or temperature of the shift motor driver is too high, which could lead to malfunction.
The P28E4 code is triggered when the vehicle's powertrain control module (PCM) detects that the current or temperature of the shift motor driver exceeds the specified threshold. This could be due to excessive resistance, a short circuit, or an overworked motor.
• Transmission not shifting properly
• Warning light on the dashboard
• Unusual noises from the transmission
• Excessive resistance in the shift motor circuit
• Short circuit in the wiring
• Overworked or faulty shift motor
Shift Motor: A component that helps change gears in the transmission.
PCM: Powertrain Control Module, the computer that controls engine and transmission functions.
• Check for any stored codes and freeze frame data
• Inspect the wiring and connectors for damage
• Test the shift motor for proper operation
• Repair or replace damaged wiring or connectors
• Replace the shift motor if faulty
• Clear the codes and test drive the vehicle
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $500
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regular maintenance checks
• Avoid overloading the vehicle
• Ensure proper transmission fluid levels
Transmission Issue
• Do not ignore the warning light
• Have the vehicle inspected by a professional
• Avoid heavy driving until the issue is resolved
Check with your vehicle's manufacturer for specific warranty coverage related to the transmission system.
This code has been associated with transmission issues in vehicles with electronic shift control systems.
Moderate – It is advisable to address this issue soon to prevent further transmission damage.
Ignoring this issue could lead to transmission failure, which can be dangerous while driving.
• Vehicle at operating temperature
• Transmission in drive mode
The shift motor is typically located on the transmission, accessible from underneath the vehicle.
Q: Can I drive with a P28E4 code?
A: It's not recommended to drive for long periods with this code, as it could lead to transmission damage.
Q: How do I reset the P28E4 code?
A: You can reset the code using an OBD-II scanner, but it's important to fix the underlying issue first.
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