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Engine-Codes – Generic – P1735

P1735 Code - Speed Sensor Reference High

Quick Answer

The P1735 diagnostic trouble code indicates a problem with the Speed Sensor Reference High in the vehicle's transmission system. Common causes include Faulty speed sensor, Wiring or connector issues related to the speed sensor, Transmission fluid contamination or low fluid levels. 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
P1735 indicates Speed Sensor Reference High.
Common causes
Common causes include Faulty speed sensor, Wiring or connector issues related to the speed sensor, Transmission fluid contamination or low fluid levels.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P1735 Description

The P1735 diagnostic trouble code indicates a problem with the Speed Sensor Reference High in the vehicle's transmission system. This sensor is responsible for monitoring the speed of the vehicle's transmission output shaft and sending this information to the vehicle's computer system. When the speed sensor reference high signal is out of range, it can cause issues with the transmission's shifting patterns, speedometer accuracy, and overall performance of the vehicle. If left unaddressed, this issue can lead to further damage to the transmission system and potentially affect the vehicle's drivability.

OBDII Code P1735 - Speed Sensor Reference High
P1735 Code - Speed Sensor Reference High

Common Causes of P1735

  1. Faulty speed sensor
  2. Wiring or connector issues related to the speed sensor
  3. Transmission fluid contamination or low fluid levels
  4. Electrical system malfunctions
  5. Issues with the vehicle's computer system

Symptoms of P1735

  1. Check engine light illuminated on the dashboard
  2. Inaccurate speedometer readings
  3. Harsh shifting or delayed shifting of gears
  4. Loss of power or acceleration
  5. Transmission slipping or jerking during gear changes

How to Fix P1735

  1. Begin by diagnosing the specific cause of the P1735 code using a diagnostic scanner and multimeter to test the speed sensor's output.
  2. Inspect the wiring and connectors associated with the speed sensor for any signs of damage or corrosion.
  3. Replace the faulty speed sensor if it is determined to be the root cause of the issue.
  4. Check and refill the transmission fluid to the proper levels if low or contaminated.
  5. Clear the trouble code from the vehicle's computer system and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1735

The typical cost to repair a P1735 code related to a Speed Sensor Reference High issue can range from $150 to $300 for parts and labor. However, as mentioned earlier, actual costs can vary based on location, vehicle make and model, and the specific diagnosis and repair process required. It is advisable to consult with local auto repair shops for a more accurate estimate based on your specific circumstances.

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Code P1735 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1735 Code

1. What are the common symptoms of OBDII code P1735 (Speed Sensor Reference High)?

- Common symptoms include erratic speedometer readings, issues with cruise control functionality, and potential transmission shifting problems.

2. What are the possible causes of OBDII code P1735?

- The code P1735 is typically triggered by a faulty speed sensor, damaged wiring or connectors related to the speed sensor, or issues with the vehicle's powertrain control module (PCM).

3. How can I diagnose the source of OBDII code P1735?

- Diagnosing the code involves using a scan tool to retrieve the specific code, checking the speed sensor and its circuit for faults, inspecting related wiring and connectors for damage, and testing the PCM for proper functionality.

4. Is it safe to continue driving with OBDII code P1735 present?

- It is not recommended to continue driving with the P1735 code active, as it can lead to potential transmission issues and affect the vehicle's overall performance and safety.

5. Can OBDII code P1735 be cleared/reset without fixing the underlying issue?

- While the code can be cleared/reset using a scan tool, it is crucial to address the root cause of the problem to prevent the code from reoccurring.

6. What are some repair tips for fixing OBDII code P1735?

- Repair tips include inspecting and replacing the faulty speed sensor, repairing damaged wiring or connectors, and ensuring proper connection and communication with the PCM.

7. Does OBDII code P1735 affect fuel efficiency?

- While the code itself may not directly impact fuel efficiency, unresolved issues related to the speed sensor can lead to overall performance issues that may affect fuel efficiency.

8. Can a DIY enthusiast fix OBDII code P1735 at home?

- Depending on the root cause of the code, DIY enthusiasts with the necessary tools and knowledge may be able to address the issue at home by replacing the speed sensor or repairing damaged wiring.

9. How much does it typically cost to repair OBDII code P1735 at a mechanic or dealership?

- The cost of repairing OBDII code P1735 can vary depending on the underlying issue, but it may range from $100 to $300 for parts and labor at a mechanic or dealership.

10. Will fixing OBDII code P1735 resolve all related vehicle issues?

- Fixing the P1735 code may resolve the specific speed sensor reference high problem, but it is essential to address any other related issues that may have been caused by the initial fault.

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