AutoCodes - OBDII Code List - P0731 DODGE

P0731 DODGE - Gear Ratio Error In First Gear

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

P0731 DODGE Possible Causes

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

How do I fix code P0731 DODGE?

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 connector's pins.
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Tech Notes

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

There is a Factory Service Bulletin for the Dodge following models:
2005-2006 Dodge Ram Truck
2005-2006 Dodge Durango
2005-2006 Dodge Dakota
Dodge Factory Service Bulletin OBDII Code P0731

Cost of diagnosing the P0731 DODGE code

Labor: 1.0

The cost of diagnosing the P0731 DODGE 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 code detected?

The ECM has detected that the transmission input RPM does not match the transmission output RPM under known conditions

Possible Symptoms

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

P0731 DODGE Description

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 (1st) 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 P0731 Dodge - Gear Ratio Error In First Gear - AutoCodes.com

More Information

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Comments

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