P0729 Code - Automatic Transmission 6th Gear Incorrect Ratio
Quick Answer
This malfunction is detected when the A/T does not shift into 6GR position as instructed by TCM. Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Hydraulic circuit fault. 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
- P0729 indicates Automatic Transmission 6th Gear Incorrect Ratio.
- Common causes
- Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Hydraulic circuit fault.
- 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 P0729 Description
What are the Possible Causes of the DTC P0729?
- Low transmission fluid level
- Shift solenoid mechanical fault
- Hydraulic circuit fault
- Transmission failure
How to Fix the DTC P0729?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0729 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
- P0729 Audi — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 Chevrolet — Transmission 6th Gear Ratio Incorrect
- P0729 Chrysler — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 Dodge — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 GMC — Transmission 6th Gear Ratio Incorrect
- P0729 Hyundai — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 Infiniti — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 Lexus — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 Mazda — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 Mitsubishi — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 Nissan — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 Toyota — Automatic Transmission 6th Gear Incorrect Ratio
- P0729 Volkswagen — Automatic Transmission 6th Gear Incorrect Ratio
Frequently Asked Questions about P0729 Code
1. What are the common symptoms of OBDII code P0729 (Automatic Transmission 6th Gear Incorrect Ratio)?
- Common symptoms include erratic shifting behavior, transmission slipping, and a noticeable decrease in fuel efficiency.
2. What are the potential causes of OBDII code P0729?
- Possible causes include a faulty transmission speed sensor, issues with the transmission control module, low transmission fluid levels, or a damaged wiring harness.
3. How can I diagnose OBDII code P0729?
- Diagnosing this code typically involves using a scan tool to retrieve the specific trouble code, checking for any related codes, and performing a visual inspection of the transmission components.
4. Can driving with OBDII code P0729 cause further damage to the vehicle?
- Continuing to drive with this code may lead to more severe transmission issues over time, potentially causing long-term damage if left unresolved.
5. What are some repair tips for fixing OBDII code P0729?
- Repair tips may include checking and replacing the transmission speed sensor, inspecting the wiring for any damage, ensuring the transmission fluid is at the correct level and in good condition, and resetting the trouble code after repairs are made.
6. Is it safe to continue driving with OBDII code P0729 present?
- It is not recommended to drive with this code present, as it can lead to further transmission problems and potential safety hazards on the road.
7. How much does it typically cost to repair OBDII code P0729?
- The cost of repairs can vary depending on the specific cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.
8. Can I reset OBDII code P0729 myself, or do I need a professional mechanic?
- You can attempt to reset the code yourself using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from reoccurring.
9. Are there any preventive measures to avoid OBDII code P0729 in the future?
- Regular maintenance of the transmission system, such as checking and changing the transmission fluid according to the manufacturer's recommendations, can help prevent issues that may trigger this code.
10. Will OBDII code P0729 cause the vehicle to go into "limp mode"?
- In some cases, the vehicle's computer may activate "limp mode" to protect the transmission from further damage when detecting this code, limiting the vehicle's performance until the issue is resolved.
Discuss the causes and fixes for P0729 OBDII Code
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hi have p0729 p0735 replace with new transmission same problem. reprogram tcm same. trans shift ok but kick out of 6th an 5th gear.i look at out put speed sensor did not see an problem with transfer case tone ring . still looking tcm must see a wrong gear .ratio rpm
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good day I have a problem with the P0729 and P0735 which gear 6 and 5 are incorrect ratio, then I just check connectors and clear the codesI drove for almost 10 km luckily does'nt comeback the code again,But Im still worried can be worse when it come it again. anyone can suggest what I need replace? my car 2010 ford falcon xt 6 speed auto
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