P1605
A/T Diagnostic Communication Line
2002-2004 Infiniti I35 3.5L V6
High SeverityPowertrain
Description
Failure in communication between ECM and TCM.
Symptoms
- CEL
- Trans stuck in failsafe
- No shifting past 2nd/3rd
- Overdrive light off
Common Causes
- Blown A/T fuse
- Faulty TCM
- Damaged communication wiring
- Corroded connectors
Diagnostic Steps
- Check A/T fuse
- Test communication line
- Inspect connectors
- Test TCM
Repair Notes
Repair communication line or replace fuse.
Other Powertrain Codes
- P0070Ambient Air Temperature Sensor Circuit
- P0071Ambient Air Temperature Sensor Range/Performance
- P0072Ambient Air Temperature Sensor Circuit Low
- P0073Ambient Air Temperature Sensor Circuit High
- P0115Engine Coolant Temperature (ECT) Sensor 1 Circuit
- P0116ECT Sensor 1 Circuit Range/Performance
- P0117ECT Sensor 1 Circuit Low Input
- P0118ECT Sensor 1 Circuit High Input
- P0119ECT Sensor 1 Circuit Intermittent
- P0125Insufficient Coolant Temperature for Closed Loop Fuel Control
P1605 on Other Vehicles
Common Questions
What does code P1605 mean on a 2002-2004 Infiniti I35?
P1605 stands for "A/T Diagnostic Communication Line". Failure in communication between ECM and TCM.
What are the symptoms of P1605 on a Infiniti I35?
Common symptoms of P1605 include: CEL, Trans stuck in failsafe, No shifting past 2nd/3rd, Overdrive light off.
What causes P1605 on a 2002-2004 Infiniti I35?
Common causes of P1605 include: Blown A/T fuse, Faulty TCM, Damaged communication wiring, Corroded connectors.