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 the part that helps the car change gears is getting too hot or using too much power.
This code indicates that the current or temperature of the motor driver for Clutch A is exceeding the expected range.
The P28D1 code is triggered when the powertrain control module (PCM) detects that the current or temperature of the motor driver for Clutch A is too high. This could be due to excessive resistance, a short circuit, or overheating of the motor driver.
• Check Engine Light is on
• Transmission may not shift properly
• Possible decrease in fuel efficiency
• Excessive resistance in the motor driver circuit
• Short circuit in the motor driver
• Overheating of the motor driver
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the motor driver for Clutch A for visible damage.
• Check the wiring and connections to the motor driver.
• Replace damaged wiring or connectors.
• Repair or replace the motor driver if faulty.
• Ensure proper cooling and ventilation for the motor driver.
• OBD-II scanner
• Multimeter
• Screwdriver set
$200 - $600
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regular maintenance of the transmission system
• Ensure proper cooling of the motor driver
• Regularly check and replace worn-out wiring
Transmission Control Issue
• Avoid driving aggressively to reduce strain on the clutch.
• Get the vehicle inspected by a professional if the Check Engine Light is on.
Check with the vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with issues in vehicles with automated manual transmissions where motor drivers are used for gear shifting.
Moderate – It is advisable to address this issue to prevent further damage to the transmission system.
Ignoring transmission issues can lead to unsafe driving conditions. Always address Check Engine Light warnings promptly.
• Engine at operating temperature
• Vehicle in motion
The motor driver for Clutch A is typically located near the transmission assembly.
Q: Can I drive with a P28D1 code?
A: It's not recommended to drive for extended periods with this code, as it may lead to transmission damage.
Q: What happens if I ignore this code?
A: Ignoring this code can result in transmission failure or more costly repairs.
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