P1630high severityPowertrain
ECM Malfunction
on 1996 Lexus LS 400 4.0L V8 · RWD
What this code means
A general ECM internal malfunction has been detected during self-testing.
Symptoms
- CEL
- Various drivability issues
- Poor running
- No start possible
Common causes
- Internal ECM failure
- Power supply issues
- Poor grounds
- Water intrusion
Diagnostic steps
- Check ECM power supply
- Test ground connections
- Inspect for water damage
- Test ECM outputs
Repair notes
Replace ECM.
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