P1604high severityPowertrain
Startability Malfunction
on 2004 Toyota MR2 1.8L I4 · FWD
What this code means
The engine failed to achieve stable running speed within expected time after cranking.
Symptoms
- CEL
- Hard starting
- Extended cranking
- Stall after start
- Rough idle
Common causes
- Fuel delivery issue
- Ignition problem
- Air leak
- Low compression
Diagnostic steps
- Check fuel pressure
- Test ignition system
- Check for vacuum leaks
- Test compression
Repair notes
Diagnose and repair root cause.
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