P0732 Lexus Code - Gear 2 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 (2nd) supposed by TCM, the slip ratio will be more than normal. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty 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
- P0732 Lexus indicates Gear 2 Incorrect Ratio.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty 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 P0732 Lexus 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 (2nd) 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 P0732 Lexus?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Shift Solenoids
- Shift Solenoids harness is open or shorted
- Shift Solenoids circuit poot electrical connection
- Transmission mechanical problems
- Transmission hydraulic control circuit
How to Fix the DTC P0732 Lexus?
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 P0732 Lexus 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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Frequently Asked Questions about P0732 Lexus Code
1. What does the OBDII code P0732 mean on a Lexus?
P0732 indicates that the transmission control module (TCM) has detected an incorrect gear ratio in second gear, which may point to a mechanical or electronic issue in the transmission system.
2. What are the common symptoms of the P0732 code in a Lexus?
Common symptoms include difficulty shifting gears, slipping in second gear, reduced fuel efficiency, harsh shifting, or the vehicle going into limp mode. The check engine light will also be illuminated.
3. What causes the P0732 code to appear on a Lexus?
Possible causes include low transmission fluid, a faulty transmission solenoid, worn clutch components, internal transmission damage, or a malfunctioning transmission control module.
4. Can low transmission fluid trigger the P0732 code?
Yes, low or contaminated transmission fluid can cause improper hydraulic pressure, leading to an incorrect gear ratio in second gear.
5. How is the P0732 code diagnosed in a Lexus?
A mechanic will use a scan tool to check for stored codes, inspect the transmission fluid level and condition, test the transmission solenoids, and possibly perform a pressure test or inspect internal transmission components.
6. How serious is the P0732 code on a Lexus?
The P0732 code is considered serious because it can lead to drivability issues, potential transmission damage, and unsafe driving conditions if not addressed promptly.
7. Can I drive my Lexus with the P0732 code?
It is not recommended to drive with the P0732 code, as it can worsen existing transmission issues and lead to more costly repairs.
8. How do you fix the P0732 code on a Lexus?
Repairs may include replacing or repairing faulty transmission solenoids, replacing damaged clutches or bands, flushing and refilling transmission fluid, or addressing internal transmission damage.
9. How much does it cost to fix the P0732 code on a Lexus?
The cost depends on the root cause. A transmission fluid change may cost $100-$250, while solenoid replacement or internal transmission repairs can range from $300 to several thousand dollars.
10. Can the P0732 code be caused by an electrical issue?
Yes, wiring problems, poor electrical connections, or a faulty transmission control module can disrupt communication and lead to the P0732 code.
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