P1655moderate severityPowertrain
TMA/TMB Signal Line Fault
on 2009 Acura RL 3.5L V6 · AWD
What this code means
Fault in communication line between ECM and transmission module.
Symptoms
- CEL
- Shifting problems
- Delayed/harsh shifts
- Stuck in one gear
Common causes
- Damaged communication wiring
- Corroded connectors
- Faulty TCM
- Faulty ECM
Diagnostic steps
- Test communication line
- Inspect connectors
- Check TCM
- Check ECM
Repair notes
Repair wiring or replace module.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1