P1704 Code - Transmission Control Module
Quick Answer
The transmission solenoids and valves are controlled by the Transmission Control Module (TCM) in response to signals sent from the Park & Neutral Position (PNP) Switch, Vehicle Speed Sensor (VSS), and Accelerator Pedal Position (APP) Sensor (Throttle Position Sensor). Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1704 indicates Transmission Control Module.
- Common causes
- Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1704 Description
What are the Possible Causes of the DTC P1704?
- Faulty Transmission Control Module (TCM)
- Transmission Control Module harness is open or shorted
- Transmission Control Module circuit poor electrical connection
How to Fix the DTC P1704?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1704 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Get the P1704 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1704 Ford — Transmission System Conditions
- P1704 Hyundai — Throttle Position Sensor High Input
- P1704 Infiniti — Transmission Control Module
- P1704 Mazda — Transmission Range Sensor Malfunction
- P1704 Nissan — Transmission Control Module
- P1704 Subaru — Shift Solenoid 2-4 Brake Timing Circuit Malfunction
Frequently Asked Questions about P1704 Code
1. What are the common symptoms of OBDII code P1704 related to the Transmission Control Module?
The common symptoms include issues with shifting gears, erratic shifting patterns, transmission slipping, and the transmission getting stuck in a particular gear.
2. What are the possible causes of OBDII code P1704 related to the Transmission Control Module?
The possible causes include a faulty transmission control module, damaged wiring or connectors in the transmission system, low transmission fluid levels, or mechanical issues within the transmission itself.
3. How can I diagnose OBDII code P1704 related to the Transmission Control Module?
Diagnosis typically involves using an OBDII scanner to read the code, conducting a visual inspection of the transmission system for any visible damage, checking the transmission fluid levels, and performing a thorough inspection of the wiring and connectors.
4. Can I continue driving my vehicle with OBDII code P1704 related to the Transmission Control Module?
It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the transmission system and potentially cause safety issues on the road.
5. How can I repair OBDII code P1704 related to the Transmission Control Module?
Repair options may include replacing the transmission control module, repairing or replacing damaged wiring or connectors, ensuring proper transmission fluid levels, and addressing any mechanical issues within the transmission.
6. Is it possible to reset OBDII code P1704 related to the Transmission Control Module with a simple reset of the vehicle's computer?
While clearing the code may temporarily eliminate the warning light, it is important to address the underlying issue causing the code to prevent further transmission problems.
7. How much does it typically cost to repair OBDII code P1704 related to the Transmission Control Module?
The cost of repair can vary depending on the specific cause of the code, but it may range from a few hundred dollars for minor repairs to over a thousand dollars for more extensive transmission system repairs.
8. Are there any preventive measures I can take to avoid OBDII code P1704 related to the Transmission Control Module in the future?
Regularly checking and maintaining proper transmission fluid levels, addressing any transmission issues promptly, and ensuring the transmission control module is functioning correctly can help prevent this code from appearing.
9. Can a DIY enthusiast tackle the repair of OBDII code P1704 related to the Transmission Control Module?
While some simple repairs like checking and topping up transmission fluid levels can be done by DIY enthusiasts, diagnosing and repairing complex issues with the transmission control module may require professional expertise and specialized tools.
10. How long does it typically take to repair OBDII code P1704 related to the Transmission Control Module?
The repair time can vary depending on the specific cause of the code and the complexity of the repair needed. It may take a few hours to a full day for more involved repairs.
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