P1605
A/T Diagnostic Communication Line
2007-2012 Nissan Altima 2.5L I4
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
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1605 on Other Vehicles
Nissan 200SX
1995-1998 1.6L I4 GA16DE
Nissan 200SX SE-R
1995-1998 2.0L I4 SR20DE
Nissan 240SX
1995-1998 2.4L I4 KA24DE
Nissan 300ZX
1990-1996 3.0L V6 VG30DE
Nissan 300ZX Twin Turbo
1990-1996 3.0L Twin-Turbo V6 VG30DETT
Nissan 350Z
2003-2006 3.5L V6 VQ35DE
Nissan 350Z
2007-2009 3.5L V6 VQ35HR
Nissan 370Z
2009-2020 3.7L V6 VQ37VHR
Common Questions
What does code P1605 mean on a 2007-2012 Nissan Altima?
P1605 stands for "A/T Diagnostic Communication Line". Failure in communication between ECM and TCM.
What are the symptoms of P1605 on a Nissan Altima?
Common symptoms of P1605 include: CEL, Trans stuck in failsafe, No shifting past 2nd/3rd, Overdrive light off.
What causes P1605 on a 2007-2012 Nissan Altima?
Common causes of P1605 include: Blown A/T fuse, Faulty TCM, Damaged communication wiring, Corroded connectors.