P0735 Code - Gear 5 Incorrect ratio
Quick Answer
This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows: Torque converter slip ratio = A x C/B A: Output shaft revolution signal from revolution sensor B: Engine speed signal from Engine Control Module (ECM) C: Gear ratio determined as gear position which TCM supposes If the actual gear position is higher than the position (5th) supposed by TCM, the slip ratio will be more than normal. Common causes include Low transmission fluid level, Dirty transmission fluid, Shift solenoids. 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 indicates Gear 5 Incorrect ratio.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Shift solenoids.
- 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.
Code P0735 Description
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is higher than the position (5th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
What are the Possible Causes of the DTC P0735?
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
How to Fix the DTC P0735?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0735 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P0735 Acura — Problem In 5th Clutch And 5th Clutch Hydraulic Circuit
- P0735 Audi — Gear 5 Incorrect Ratio
- P0735 BMW — Gear 5 Incorrect ratio
- P0735 Chevrolet — Transmission 5th Gear Ratio Incorrect
- P0735 Chrysler — Gear Ratio Error In Fifth Gear
- P0735 Dodge — Gear Ratio Error In Fifth Gear
- P0735 Ford — Incorrect Fifth Gear Ratio
- P0735 GMC — Transmission 5th Gear Ratio Incorrect
- P0735 Honda — Problem In 5th Clutch And 5th Clutch Hydraulic Circuit
- P0735 Hyundai — Fifth Gear Incorrect Ratio
- P0735 Infiniti — 5th. Gear Malfunction
- P0735 Jeep — Gear Ratio Error In Fifth Gear
- P0735 KIA — Fifth Gear Incorrect Ratio
- P0735 Land Rover — Gear 5 Incorrect Ratio
- P0735 Lexus — Gear 5 Incorrect Ratio
- P0735 Mazda — Fifth Gear Error
- P0735 Mercedes-Benz — Gear 5 Incorrect ratio
- P0735 MINI — Gear 5 Incorrect ratio
- P0735 Mitsubishi — Gear 5 Incorrect Ratio
- P0735 Nissan — 5th. Gear Malfunction
- P0735 Saturn — Gear 5 Incorrect Ratio
- P0735 Subaru — Gear 5 Incorrect Ratio
- P0735 Suzuki — Gear 5 Incorrect Ratio
- P0735 Toyota — Gear 5 Incorrect Ratio
- P0735 Volkswagen — Gear 5 Incorrect Ratio
Frequently Asked Questions about P0735 Code
1. What does the OBDII code P0735 mean?
P0735 indicates that the transmission is experiencing an incorrect gear ratio in 5th gear, often due to mechanical or electrical issues.
2. What are the common symptoms of code P0735?
Symptoms include transmission slipping, difficulty shifting into 5th gear, reduced fuel efficiency, and the check engine light being illuminated.
3. What causes the P0735 code?
Common causes include low transmission fluid, worn clutch packs, a faulty shift solenoid, damaged transmission bands, or a malfunctioning transmission control module (TCM).
4. Can I drive my car with a P0735 code?
Driving with a P0735 code is not recommended as it can cause further damage to the transmission and lead to unsafe driving conditions.
5. How is the P0735 code diagnosed?
A mechanic will check the transmission fluid level, inspect for mechanical damage, test the shift solenoids, and use a scan tool to monitor transmission data.
6. How do I fix the P0735 code?
Repairs may involve replacing the shift solenoid, refilling or flushing transmission fluid, repairing internal transmission components, or reprogramming the TCM.
7. Can low transmission fluid cause the P0735 code?
Yes, low or contaminated transmission fluid can disrupt proper gear engagement and lead to an incorrect gear ratio.
8. How much does it cost to repair the P0735 code?
Costs vary widely, ranging from $100 for a fluid change to several thousand dollars for a transmission rebuild, depending on the severity of the issue.
9. Will a P0735 code cause long-term damage?
If left unaddressed, a P0735 code can cause significant damage to the transmission, leading to more expensive repairs.
10. Can a faulty TCM trigger the P0735 code?
Yes, a malfunctioning transmission control module can send incorrect signals, causing gear ratio errors like P0735.
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