C1729 Code - Vehicle Speed Signal
Quick Answer
The C1729 code refers to an issue with the vehicle speed signal. Common causes include Faulty speed sensor, Damaged wiring or connectors related to the speed sensor, Corrosion or debris on the speed sensor. 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
- C1729 indicates Vehicle Speed Signal.
- Common causes
- Common causes include Faulty speed sensor, Damaged wiring or connectors related to the speed sensor, Corrosion or debris on the speed sensor.
- 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.
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Code C1729 Description
The C1729 code refers to an issue with the vehicle speed signal. This code indicates that the vehicle's onboard computer system is not receiving a proper signal from the speed sensor, which can affect various systems in the vehicle. The speed signal is crucial for the proper functioning of systems such as the transmission, ABS brakes, traction control, cruise control, and more. Without an accurate speed signal, the vehicle may experience shifting issues, reduced fuel efficiency, erratic speedometer readings, and potential safety hazards.
Common Causes of C1729
- Faulty speed sensor
- Damaged wiring or connectors related to the speed sensor
- Corrosion or debris on the speed sensor
- Issues with the vehicle's computer system
- Faulty instrument cluster
Symptoms of C1729
- Inaccurate speedometer readings
- Transmission shifting irregularities
- ABS or traction control warning lights illuminated
- Cruise control not working properly
- Engine misfires or stalling
How to Fix C1729
- Diagnose the issue by connecting a code reader to the vehicle's OBD-II port to retrieve the specific fault code.
- Inspect the speed sensor, wiring, and connectors for any visible damage or corrosion. Replace or repair as necessary.
- Clear the fault code from the vehicle's computer system and test drive the vehicle to see if the issue has been resolved.
- If the problem persists, further diagnostic testing may be needed to pinpoint the exact cause, such as checking the vehicle's computer system or instrument cluster.
- Replace the speed sensor or any other faulty components identified during the diagnostic process.
Cost to Fix C1729
The cost of repairing a vehicle speed signal issue can vary depending on the specific cause of the problem and the labor rates in your area. Generally, the cost of replacing a speed sensor can range from $100 to $300, including parts and labor. Additional diagnostic testing or repairs may increase the overall cost. It's advisable to consult with a trusted mechanic or auto repair shop for a more accurate estimate based on your vehicle make and model.
When is the Code Detected?
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Code C1729 Information for Specific Makes
- C1729 Ford — The Vehicle Does Not Shift Between 4H And 4L Modes Correctly
- C1729 Infiniti — Vehicle Speed Signal
- C1729 Lincoln — The Vehicle Does Not Shift Between 4H And 4L Modes Correctly
- C1729 Mercury — The Vehicle Does Not Shift Between 4H And 4L Modes Correctly
- C1729 Nissan — Vehicle Speed Signal
Frequently Asked Questions about C1729 Code
1. What are common symptoms of OBDII code C1729 (Vehicle Speed Signal)?
- Common symptoms include issues with the speedometer, cruise control not working properly, and the ABS warning light being illuminated.
2. What are the possible causes of OBDII code C1729?
- Possible causes include a faulty vehicle speed sensor, damaged wiring or connectors related to the speed sensor, or a problem with the ABS module.
3. How do I diagnose the cause of OBDII code C1729?
- To diagnose the issue, you can use a diagnostic scan tool to check for the specific code, inspect the vehicle speed sensor and its wiring, and test the ABS module for any faults.
4. Can a faulty vehicle speed sensor cause OBDII code C1729?
- Yes, a faulty vehicle speed sensor is a common cause of OBDII code C1729 as it affects the transmission of speed signal data to the ABS module.
5. What are some repair tips for fixing OBDII code C1729?
- Repair tips may include replacing the vehicle speed sensor, repairing or replacing damaged wiring or connectors, and checking the ABS module for any issues.
6. Is it safe to continue driving with OBDII code C1729 active?
- It is not recommended to continue driving with OBDII code C1729 active, as it can affect the proper functioning of important vehicle systems like ABS and cruise control.
7. Can weather conditions affect OBDII code C1729?
- Yes, extreme weather conditions or exposure to water can sometimes lead to issues with the vehicle speed sensor, causing OBDII code C1729 to be triggered.
8. How much does it typically cost to repair OBDII code C1729?
- The cost of repairing OBDII code C1729 can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.
9. Will OBDII code C1729 cause my vehicle to fail an emissions test?
- OBDII code C1729 is related to the vehicle speed signal and may not directly cause a vehicle to fail an emissions test, but it should still be addressed to ensure proper vehicle functionality.
10. Can I reset OBDII code C1729 without fixing the underlying issue?
- While you can clear the code temporarily by resetting the vehicle's computer, it is not recommended to ignore the underlying issue causing OBDII code C1729 as it may lead to further problems down the line.
Discuss the causes and fixes for C1729 OBDII Code
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The C1729 code comes I have a 2004 Nissan Quest. I have not replaced any parts.
It says VHCL speed sig err
other c codes
C1724 (Batt Volt Low) FL
C1726 (Batt Volt low ) RR
C1704 Low Pressure Fl
C1705 Low Pressure FR
C1706 Low Pressure RR
C1707 Low Pressure RL
C1708, C1709, C1710, C1711 All say no data -
Unfortunately I can't find any information in the 2004 Nissan Quest factory service manual for those codes. Please double check the codes. The other C codes you listed are for the "Tire Pressure Monitor System" (TPMS)
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There is no C1729 on the Sentra. I recommend check with another scanner. The fan will turn ON when there is a problem with Engine Control Module (ECM)
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