Engine-CodesJeep – P0735 Jeep

P0735 Jeep Code - Gear Ratio Error In Fifth Gear

Quick Answer

The P0735 code in a Jeep indicates a gear ratio error specifically in fifth gear. Common causes include Faulty transmission input speed sensor, Malfunctioning transmission output speed sensor, Wiring harness issues or connectivity problems. 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
P0735 Jeep indicates Gear Ratio Error In Fifth Gear.
Common causes
Common causes include Faulty transmission input speed sensor, Malfunctioning transmission output speed sensor, Wiring harness issues or connectivity problems.
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.
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0735 Jeep Description

The P0735 code in a Jeep indicates a gear ratio error specifically in fifth gear. This means that the engine control module (ECM) has detected that the gear ratio between the input RPM signal and the output RPM signal in the transmission is not within the expected range for fifth gear. This discrepancy can lead to issues with the transmission's shifting behavior, overall performance, and fuel efficiency.

OBDII Code P0735 Jeep - Gear Ratio Error In Fifth Gear
P0735 Jeep Code - Gear Ratio Error In Fifth Gear

Common Causes of P0735 Jeep

  1. Faulty transmission input speed sensor
  2. Malfunctioning transmission output speed sensor
  3. Wiring harness issues or connectivity problems
  4. Failing transmission solenoids
  5. Internal mechanical problems within the transmission, such as worn gears or clutches

Symptoms of P0735 Jeep

  1. Harsh or delayed shifting in fifth gear
  2. Slipping or flaring when accelerating in fifth gear
  3. Engine revving higher than normal without corresponding acceleration
  4. Illumination of the Check Engine Light
  5. Decreased fuel efficiency

How to Fix P0735 Jeep

  1. Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific trouble codes and confirm the presence of P0735.
  2. Inspect the transmission input and output speed sensors for proper operation and replace them if necessary.
  3. Check the wiring harness for any signs of damage or corrosion, repairing or replacing any affected sections as needed.
  4. Test the transmission solenoids for proper function and replace any that are faulty.
  5. If the above steps do not resolve the issue, a more in-depth inspection of the transmission may be required to identify and address internal mechanical problems.

Cost to Fix P0735 Jeep

The typical repair costs for addressing a P0735 code in a Jeep can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, you can expect to pay anywhere from $200 to $800 for parts and labor. Keep in mind that labor rates at auto repair shops can range from $80 to $150 per hour, so the total cost may be higher in metropolitan areas or at dealerships. It is recommended to obtain quotes from multiple shops to compare prices and ensure you are getting a fair deal.

Tech Notes for P0735 Jeep

Start by inspecting the transmission fluid level and condition, and change fluid if necessary.

When is the Code Detected?

The ECM has detected that the transmission input RPM does not match the transmission output RPM under known conditions

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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.

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