AutoCodes – Mercedes-Benz – P0736 Mercedes-Benz

P0736 Mercedes-Benz Code - Reverse Incorrect Gear 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 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: P0736 Mercedes-Benz indicates Reverse Incorrect Gear 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.

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Code Popularity 6,009

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 29, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0736 Mercedes-Benz Description

OBDII Code P0736 Mercedes-Benz - Reverse Incorrect Gear Ratio - AutoCodes.com — P0736 Mercedes-Benz Code - Reverse Incorrect Gear Ratio

What does this mean?

What are the Possible Causes of the DTC P0736 Mercedes-Benz?

Low transmission fluid level
Dirty transmission fluid
Shift solenoids
Transmission mechanical problems
Transmission hydraulic control circuit

How to Fix the DTC P0736 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.

What does this mean?

Code Tech Notes

Start by inspecting the transmission fluid level and condition, and change fluid if necessary.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0736 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.

Need more information about the P0736 Mercedes-Benz code?

Need more information on how to fix the P0736 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0736 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0736 Mercedes-Benz Code

1. What does the OBDII code P0736 mean on a Mercedes-Benz?

P0736 indicates "Reverse Incorrect Gear Ratio," meaning the transmission control module (TCM) has detected an incorrect ratio while the vehicle is in reverse gear.

2. What are the common symptoms of a P0736 code in a Mercedes-Benz?

Symptoms may include difficulty engaging reverse gear, hesitation or slipping in reverse, abnormal noises, or the transmission going into limp mode.

3. What causes the P0736 code in a Mercedes-Benz?

Common causes include low or dirty transmission fluid, a faulty transmission control module (TCM), a damaged reverse gear, worn clutches, or a malfunctioning speed sensor.

4. Can low transmission fluid cause the P0736 code?

Yes, low or contaminated transmission fluid can result in poor hydraulic pressure, leading to the incorrect gear ratio in reverse.

5. How do I diagnose the P0736 code on my Mercedes-Benz?

Start by checking the transmission fluid level and condition. Then inspect the speed sensors, TCM, and internal transmission components for damage or wear.

6. Is it safe to drive my Mercedes-Benz with a P0736 code?

Driving with this code is not recommended as it may cause further damage to the transmission and affect the vehicle's ability to operate safely.

7. How much does it cost to fix a P0736 code in a Mercedes-Benz?

Repair costs vary depending on the cause. Minor issues like fluid changes may cost $100-$200, while major transmission repairs or replacements can range from $1,000 to $5,000.

8. Can a faulty speed sensor trigger the P0736 code?

Yes, a malfunctioning speed sensor can send incorrect data to the TCM, causing it to misinterpret the gear ratio and trigger the P0736 code.

9. How can I prevent the P0736 code from occurring in the future?

Regularly maintain your transmission by checking and replacing the fluid as needed, and address any transmission-related issues promptly to prevent wear and damage.

10. Do I need a mechanic to fix the P0736 code on my Mercedes-Benz?

While some issues, like checking fluid levels, can be done at home, diagnosing and repairing transmission problems often requires professional tools and expertise.