Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected a problem with the signals it uses to control the gears when shifting between 5th and 3rd gear. It's like when you try to change gears on your bike, but the chain doesn't move properly.
The car's transmission control module monitors the duty cycle of the circuit responsible for shifting between 5th and 3rd gear. If the duty cycle is lower than expected, it triggers this code.
The P174E code indicates that the transmission control module (TCM) has detected a duty cycle that is too low in the circuit responsible for gear shift positions 5 and 3. This can affect the vehicle's ability to shift gears smoothly and may result in poor transmission performance.
• Difficulty shifting gears
• Transmission slipping
• Check Engine Light illuminated
• Faulty transmission solenoid
• Wiring issues in the transmission circuit
• Malfunctioning transmission control module (TCM)
Duty Cycle: The percentage of one period in which a signal or system is active.
Transmission Solenoid: An electromechanical component used to control the flow of transmission fluid in the transmission.
• Check for any other related transmission codes.
• Inspect the wiring and connectors for damage or corrosion.
• Test the transmission solenoids for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace faulty transmission solenoid.
• Reprogram or replace the transmission control module (TCM) if necessary.
• OBD-II scanner
• Multimeter
• Wiring diagram
$200 - $800
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regular transmission maintenance
• Check and replace transmission fluid as needed
• Inspect wiring and connectors periodically
Transmission Control Issue
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult a professional mechanic for diagnosis and repair.
Transmission repairs may be covered under powertrain warranty if within the warranty period.
This code has been associated with transmission shifting issues in vehicles with electronic control systems.
High – This issue can lead to further transmission damage if not addressed promptly.
Driving with a malfunctioning transmission can be dangerous and may result in loss of vehicle control.
• Vehicle must be in operation
• Transmission must be shifting between gears
The transmission solenoids and wiring are located within the transmission assembly, typically accessible from underneath the vehicle.
Q: Can I drive my car with a P174E code?
A: It's not recommended to drive with this code active, as it can cause further transmission damage.
Q: How do I reset the P174E code?
A: After repairs, you can use an OBD-II scanner to clear the code, but it may return if the issue is not fully resolved.
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