P1655moderate severityPowertrain
TMA/TMB Signal Line Fault
on 2009 Acura MDX 3.7L 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
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1