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 confused about the gear the car is in. It's like when you think you're in one room, but you're actually in another.
The transmission control module (TCM) is receiving an implausible signal from the gear shift position sensor for gears 5 and 3.
The code P174F indicates that the transmission control module has detected an implausible signal from the gear shift position sensor or circuit when shifting between gears 5 and 3. This could be due to a faulty sensor, wiring issues, or a problem with the TCM itself.
• Check Engine Light is on
• Transmission may not shift properly
• Vehicle may go into limp mode
• Faulty gear shift position sensor
• Wiring or connector issues in the gear shift circuit
• Malfunctioning transmission control module (TCM)
Transmission Control Module (TCM): A computer that controls the transmission's operation.
Gear Shift Position Sensor: A sensor that detects the current gear position of the transmission.
• Use an OBD-II scanner to read the code and confirm the issue.
• Inspect the gear shift position sensor and its wiring for damage.
• Test the transmission control module for proper operation.
• Replace the faulty gear shift position sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the transmission control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools (screwdrivers, wrenches)
$150 - $500
Moderate
• Audi A4
• Volkswagen Passat
• Skoda Superb
• Regularly check and maintain transmission fluid levels.
• Inspect wiring and connectors for damage periodically.
• Have the transmission system checked during regular service intervals.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for a thorough diagnosis.
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with vehicles that have electronic transmission controls, particularly in models with complex gear systems.
Moderate – Address the issue soon to avoid potential transmission damage.
Driving with a malfunctioning transmission can be unsafe and may lead to further mechanical issues.
• Vehicle must be in motion to test gear shifting.
• Transmission fluid should be at operating temperature.
The gear shift position sensor is typically located on the transmission housing or near the gear shifter.
Q: Can I drive with a P174F code?
A: It's not recommended to drive with this code active, as it may cause further damage to the transmission.
Q: How do I reset the P174F code?
A: After resolving the issue, you can use an OBD-II scanner to clear the code. However, it may return if the underlying problem is not fixed.
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