P0731 Saturn Code - Gear 1 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 (1st) 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
- P0731 Saturn indicates Gear 1 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 P0731 Saturn 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 (1st) 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 P0731 Saturn?
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
How to Fix the DTC P0731 Saturn?
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 P0731 Saturn 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.
Need more information about the P0731 Saturn code?
Need more information on how to fix the P0731 Saturn code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0731 Saturn code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0731 Saturn Code
1. What are common symptoms of OBDII code P0731 in a Saturn related to Gear 1 Incorrect Ratio?
- Common symptoms include harsh shifting, decreased fuel efficiency, and the transmission slipping or failing to engage properly.
2. What are the potential causes of OBDII code P0731 in a Saturn?
- The code P0731 in a Saturn may be caused by issues such as low transmission fluid levels, a faulty transmission solenoid, a damaged clutch, or problems with the transmission control module.
3. How should I diagnose the OBDII code P0731 in a Saturn?
- Diagnosing the code P0731 involves using a scan tool to check for the specific error code, inspecting the transmission fluid level and condition, and conducting a thorough inspection of the transmission components and sensors.
4. Can driving with OBDII code P0731 in a Saturn cause further damage?
- Continuing to drive with the code P0731 in a Saturn can potentially cause further damage to the transmission system, leading to more costly repairs in the future.
5. What are some repair tips for fixing OBDII code P0731 in a Saturn?
- Repair tips may include checking and topping up transmission fluid levels, replacing faulty transmission solenoids, repairing or replacing damaged clutches, and ensuring proper functioning of the transmission control module.
6. Is it safe to continue driving my Saturn with OBDII code P0731 present?
- It is not recommended to continue driving your Saturn with the code P0731 present, as it can lead to further damage to the transmission system and potentially leave you stranded on the road.
7. How much does it typically cost to repair OBDII code P0731 in a Saturn?
- The cost of repairing the code P0731 in a Saturn can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.
8. Can I reset the OBDII code P0731 in my Saturn without fixing the underlying issue?
- While you can reset the code using a scan tool, it is important to address the underlying issue causing the code P0731 to prevent further transmission problems.
9. Are there any preventive maintenance steps to avoid OBDII code P0731 in a Saturn?
- Regularly checking and maintaining proper transmission fluid levels, following the manufacturer's recommended service intervals, and addressing any transmission issues promptly can help prevent the occurrence of the code P0731 in a Saturn.
10. How long does it typically take to repair OBDII code P0731 in a Saturn?
- The repair time for the code P0731 in a Saturn can vary depending on the specific cause of the issue and the extent of repairs needed, but it may take anywhere from a few hours to a full day at a repair shop.
Discuss the causes and fixes for P0731 Saturn OBDII Code
-
I HAVE THIS CODE P0731 BUT MY PROBLEM IS ONLY WHEN I BEGIN TO DRIVE IN SPORT MODE IN FIRS GEAR.BY D SHIFT POSITION THERE IS NO PROBLEM
PLEASE HELP ME
THANK YOU -
To fix your problem, you should start by servicing the transmission fluid and clearing the code. Don't flush the transmission just exchange the fluid.
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