Engine-Codes - Mercedes-benz - P0733 MERCEDES-BENZ

P0733 MERCEDES-BENZ Code - Gear 3 Incorrect ratio

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

|P0733 MERCEDES-BENZ code possible causes

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

|How is the P0733 MERCEDES-BENZ code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|P0733 MERCEDES-BENZ code tech notes

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

|What is the cost to diagnose the P0733 MERCEDES-BENZ code

Labor: 1.0

The cost to diagnose the P0733 MERCEDES-BENZ code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0733 MERCEDES-BENZ code detected?

P0733 is detected when A/T cannot be shifted to the 3rd gear position even if electrical circuit is good.

|What are P0733 MERCEDES-BENZ code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Incorrect transmission shifting

|What is P0733 MERCEDES-BENZ code meaning?

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 (3rd) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

|Need more information with the P0733 MERCEDES-BENZ code?

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|Need help with a P0733 MERCEDES-BENZ code?

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