P1655
TMA/TMB Signal Line Fault
2016-2021 Honda Civic 2.0L I4
Moderate SeverityPowertrain
Description
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
- 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
P1655 on Other Vehicles
Common Questions
What does code P1655 mean on a 2016-2021 Honda Civic?
P1655 stands for "TMA/TMB Signal Line Fault". Fault in communication line between ECM and transmission module.
What are the symptoms of P1655 on a Honda Civic?
Common symptoms of P1655 include: CEL, Shifting problems, Delayed/harsh shifts, Stuck in one gear.
What causes P1655 on a 2016-2021 Honda Civic?
Common causes of P1655 include: Damaged communication wiring, Corroded connectors, Faulty TCM, Faulty ECM.