P0735 Toyota Code - Gear 5 Incorrect Ratio
Quick Answer
The P0735 diagnostic trouble code for Toyota vehicles indicates a problem with the transmission's fifth gear, specifically an incorrect gear ratio. Common causes include Low transmission fluid levels or dirty fluid, Faulty transmission solenoids, Malfunctioning valve body. 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 Toyota indicates Gear 5 Incorrect Ratio.
- Common causes
- Common causes include Low transmission fluid levels or dirty fluid, Faulty transmission solenoids, Malfunctioning valve body.
- 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 P0735 Toyota Description
The P0735 diagnostic trouble code for Toyota vehicles indicates a problem with the transmission's fifth gear, specifically an incorrect gear ratio. This means that the transmission is not shifting into fifth gear as it should, or that the gear is slipping, causing the gear ratio to be incorrect. This can result in issues with acceleration, fuel efficiency, and overall performance of the vehicle.
Common Causes of P0735 Toyota
- Low transmission fluid levels or dirty fluid
- Faulty transmission solenoids
- Malfunctioning valve body
- Worn clutch packs
- Wiring or electrical issues in the transmission system
Symptoms of P0735 Toyota
- Slipping gears while driving
- Delayed or harsh shifting
- Poor acceleration
- Decreased fuel efficiency
- Illuminated check engine light
How to Fix P0735 Toyota
- Check and top off transmission fluid levels
- Perform a transmission flush and filter replacement
- Test and replace faulty transmission solenoids
- Inspect and repair or replace the valve body
- Rebuild or replace worn clutch packs
Cost to Fix P0735 Toyota
The cost of repairing a P0735 code on a Toyota vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the repair costs for this type of transmission issue can range from $500 to $1500, including parts and labor. It's important to note that the actual cost may be higher or lower based on the severity of the problem and the rates charged by the auto repair shop. Diagnostic time and labor rates at auto repair shops can vary, so it's recommended to get a detailed estimate from a trusted mechanic before proceeding with the repairs.
Tech Notes for P0735 Toyota
When is the Code Detected?
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Frequently Asked Questions about P0735 Toyota Code
1. What does the OBDII code P0735 mean on a Toyota?
P0735 indicates "Gear 5 Incorrect Ratio," meaning the transmission control module (TCM) has detected an issue with the gear ratio in fifth gear, often due to slippage or incorrect speed readings.
2. What are the common symptoms of a P0735 code?
Symptoms may include poor acceleration, harsh or delayed shifting, slipping in fifth gear, decreased fuel efficiency, and the check engine light being illuminated.
3. What causes the P0735 code on a Toyota?
Common causes include low or dirty transmission fluid, a faulty shift solenoid, a malfunctioning transmission speed sensor, worn-out clutches or bands, or internal transmission damage.
4. Can driving with a P0735 code damage my Toyota further?
Yes, driving with this code can cause more damage to the transmission if the issue involves slippage, overheating, or internal wear, so it’s best to address it promptly.
5. How do I diagnose a P0735 code on my Toyota?
Start by checking the transmission fluid level and condition, then inspect the transmission speed sensors, shift solenoids, and wiring for damage. If necessary, perform a pressure test or have the transmission inspected by a professional.
6. Can low transmission fluid cause a P0735 code?
Yes, low or contaminated transmission fluid can lead to poor hydraulic pressure and slippage, which may trigger the P0735 code.
7. How much does it cost to fix a P0735 code on a Toyota?
Repair costs vary depending on the root cause. Fluid replacement may cost $100–$250, while sensor or solenoid replacements range from $150–$500. Major transmission repairs can exceed $1,000.
8. Can a bad speed sensor trigger the P0735 code?
Yes, a faulty transmission speed sensor can send incorrect signals to the TCM, causing it to misinterpret the gear ratio and trigger the P0735 code.
9. Is it possible to fix a P0735 code without rebuilding the transmission?
Yes, if the issue is related to fluid levels, sensors, solenoids, or wiring, repairs can often be made without a full transmission rebuild.
10. What should I do if my Toyota shows a P0735 code?
Stop driving the vehicle if possible, check the transmission fluid, and have the vehicle diagnosed by a professional to prevent further damage and ensure proper repairs.
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