P0732 Mercedes-Benz 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 Mercedes-Benz 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 Mercedes-Benz 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 Mercedes-Benz?
- 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 Mercedes-Benz?
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 Mercedes-Benz 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 Mercedes-Benz Code
1. What does the OBDII code P0732 mean for a Mercedes-Benz?
P0732 indicates that the transmission is experiencing an incorrect gear ratio in second gear, often due to mechanical or electronic issues.
2. What are the common symptoms of code P0732 in a Mercedes-Benz?
Symptoms may include slipping or hesitation in second gear, poor acceleration, reduced fuel efficiency, or the transmission staying in limp mode.
3. What causes the P0732 code in a Mercedes-Benz?
Common causes include low transmission fluid, worn clutches, damaged gear components, faulty shift solenoids, or problems with the transmission control module (TCM).
4. Can driving with code P0732 damage the transmission?
Yes, continuing to drive with this code can lead to further transmission damage due to improper operation or excessive wear on internal components.
5. How can low transmission fluid cause the P0732 code?
Low transmission fluid can lead to insufficient hydraulic pressure, preventing the transmission from properly engaging second gear.
6. How do you diagnose the P0732 code on a Mercedes-Benz?
Diagnosis involves checking transmission fluid levels, inspecting wiring and connectors, testing shift solenoids, and performing a detailed scan of the transmission control module (TCM).
7. Can a faulty shift solenoid trigger the P0732 code?
Yes, if the shift solenoid responsible for second gear operation fails, it can cause incorrect gear ratios and trigger the P0732 code.
8. What repairs are commonly needed to fix the P0732 code?
Repairs may include replacing the transmission fluid, repairing or replacing shift solenoids, rebuilding worn clutches, or reprogramming the transmission control module.
9. How much does it cost to fix the P0732 code in a Mercedes-Benz?
The cost varies depending on the issue, ranging from $100 for fluid replacement to several thousand dollars for major transmission repairs.
10. Can a software update fix the P0732 code on a Mercedes-Benz?
In some cases, a software update or reprogramming of the transmission control module can resolve the issue if it's caused by incorrect programming or calibration.
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