For Shop Owners

P1605 INFINITI - Automatic Transmission Communication

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

Possible causes

  • Weak battery
  • Faulty Transmission Control Module (TCM)
  • Harness is open or shorted between TCM and Engine Control Module (ECM)
  • Poor circuit electrical connection between TCM and ECM
What does this mean?

Tech notes

There is a service bulletin for the 2001 Infiniti I30.

What does this mean?

When is the code detected?

Malfunction is detected when an incorrect signal from Transmission control module (TCM) is sent to Engine Control Module (ECM).

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1605 INFINITI Description

The malfunction information related to Automatic Transmission is transferred through the line circuit from Transmission control module (TCM) to Engine Control Module (ECM).
OBDII Code P1605 Infiniti - Automatic Transmission Communication -

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P1605 INFINITI Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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