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P0731 2002 NISSAN ALTIMA SEDAN Code - 1st. Gear Malfunction

- Code Popularity: 4,644 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By AutoCodes.com - Updated Jun 29, 2020
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|P0731 2002 NISSAN ALTIMA SEDAN code possible causes

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

|How do I fix code P0731 2002 NISSAN ALTIMA SEDAN 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 connector's pins.

Does your car have Safety Recalls? → Check here

|P0731 2002 NISSAN ALTIMA SEDAN code tech notes

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

There is a Factory Service Bulletin for the 2002 Nissan Altima:
2002 Nissan Altima Factory Service Bulletin OBDII Code P0731

|Cost of diagnosing P0731 2002 NISSAN ALTIMA SEDAN code

Labor: 1.0

The cost of diagnosing the P0731 2002 NISSAN ALTIMA SEDAN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|When is the P0731 2002 NISSAN ALTIMA SEDAN code detected?

P0731 is detected when A/T cannot be shifted to the 1st gear position even if electrical circuit is good.

|What are P0731 2002 NISSAN ALTIMA SEDAN code possible symptoms?

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

|P0731 2002 NISSAN ALTIMA SEDAN code 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 2002 nissan altima sedan - 1st. Gear Malfunction - AutoCodes.com
P0731 2002 NISSAN ALTIMA SEDAN Code - 1st. Gear Malfunction

|Need more information with the P0731 2002 NISSAN ALTIMA SEDAN code?

Need more information on how to fix the P0731 2002 NISSAN ALTIMA SEDAN code? Get Access to Factory Service Manuals

|Need help with a P0731 2002 NISSAN ALTIMA SEDAN code?

Get the p0731 2002 nissan altima sedan code diagnosed by a professional: Find a repair shop in your area

|P0731 2002 NISSAN ALTIMA SEDAN code comments

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