Engine-Codes - Toyota - P0730 TOYOTA

P0730 TOYOTA Code - Incorrect Gear Ratio

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

|P0730 TOYOTA code possible causes

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

|How is the P0730 TOYOTA 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.

|P0730 TOYOTA code tech notes

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

|What is the cost to diagnose the P0730 TOYOTA code

Labor: 1.0

The cost to diagnose the P0730 TOYOTA 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 P0730 TOYOTA code detected?

The TCM has detected that the transmission is trying to mechanically shift to a lower gear than intended

|What are P0730 TOYOTA code possible symptoms?

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

|What is P0730 TOYOTA 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 speed sensor (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 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 P0730 TOYOTA code?

Need more information on how to fix the P0730 TOYOTA code?
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|Need help with a P0730 TOYOTA code?

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