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Code P0735

Quick reference

P0735 at a glance

Plain-language meaning
This means that the car's computer thinks the fifth gear isn't working right. It's like when you try to ride a bike in a high gear, but it feels like the chain isn't on the right sprocket.
Urgency
High – Continuing to drive with this issue can lead to severe transmission damage.
Difficulty
Difficult
System
Transmission Performance
Tools mentioned
OBD-II scanner, Transmission fluid dipstick, Multimeter, Transmission pressure gauge, Socket set

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This means that the car's computer thinks the fifth gear isn't working right. It's like when you try to ride a bike in a high gear, but it feels like the chain isn't on the right sprocket.

Explanation

The transmission control module (TCM) has detected a problem with the gear ratio in fifth gear, meaning the actual gear ratio does not match the expected ratio.

Technical description

The P0735 code is triggered when the TCM detects that the actual transmission gear ratio in fifth gear does not match the expected ratio. This can occur due to mechanical issues within the transmission or problems with the transmission control system.

Symptoms

• Check Engine Light is on

• Transmission slipping

• Poor acceleration

• Unusual noises from the transmission

• Vehicle stuck in limp mode

Common Causes

• Faulty shift solenoid

• Low transmission fluid level

• Worn or damaged gears

• Faulty transmission control module

• Internal transmission failure

Glossary

Transmission Control Module (TCM): A computer that controls the operation of the transmission.

Shift Solenoid: An electromechanical valve used to control the flow of transmission fluid.

Diagnosis steps

• Check the transmission fluid level and condition.

• Inspect the transmission wiring and connectors.

• Test the shift solenoids for proper operation.

• Perform a transmission pressure test.

• Scan for additional trouble codes.

Repair procedures

• Replace or repair faulty shift solenoids.

• Refill or replace transmission fluid.

• Repair or replace damaged gears.

• Reprogram or replace the transmission control module.

• Rebuild or replace the transmission if necessary.

Tools required

• OBD-II scanner

• Transmission fluid dipstick

• Multimeter

• Transmission pressure gauge

• Socket set

Estimated repair cost

$300 to $2500, depending on the severity and specific repairs needed

Difficulty level

Difficult

Commonly affected vehicles

• Honda Accord

• Ford F-150

• Toyota Camry

Preventive measures

• Regularly check and maintain transmission fluid levels.

• Schedule routine transmission inspections.

• Avoid aggressive driving habits that stress the transmission.

Error code type

Transmission Performance

User experience recommendations

• Avoid driving the vehicle until repaired to prevent further damage.

• Consult with a professional mechanic for a proper diagnosis.

Warranty information

Transmission repairs may be covered under powertrain warranty if applicable.

Historical data

The P0735 code has been a common issue in vehicles with automatic transmissions, often related to wear and tear or lack of maintenance.

Urgency level

High – Continuing to drive with this issue can lead to severe transmission damage.

Testing conditions

• Vehicle at operating temperature

• Driving conditions that allow for gear shifts

Component location

The transmission is located underneath the vehicle, typically near the center, connected to the engine.

FAQs

Q: Can I drive with a P0735 code?
A: It's not recommended to drive with this code as it can cause further damage to the transmission.

Q: How do I fix a P0735 code?
A: Fixing this code typically involves checking the transmission fluid, inspecting solenoids, and possibly repairing or replacing parts of the transmission.

Optional diagnostic gear

Tools that may help diagnose P0735

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

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Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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