P0733 BMW - Gear 3 Incorrect ratio

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

P0733 BMW Possible Causes

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

First diagnose P0733 BMW code

    Check 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 terminals.

P0733 BMW Tech Notes

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

Cost of diagnosing the P0733 BMW code

    Labor: 1.0

    The cost of diagnosing the P0733 BMW code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the P0733 BMW code detected?

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

P0733 BMW Possible Symptoms

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

P0733 BMW 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.

OBDII Code P0733 BMW - Gear 3 Incorrect ratio - Engine-Codes.com

P0733 BMW More Information

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