P1604
Startability Malfunction
1990-2002 Toyota 4Runner 2.7L I4
High SeverityPowertrain
Description
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
- 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
P1604 on Other Vehicles
Common Questions
What does code P1604 mean on a 1990-2002 Toyota 4Runner?
P1604 stands for "Startability Malfunction". The engine failed to achieve stable running speed within expected time after cranking.
What are the symptoms of P1604 on a Toyota 4Runner?
Common symptoms of P1604 include: CEL, Hard starting, Extended cranking, Stall after start, Rough idle.
What causes P1604 on a 1990-2002 Toyota 4Runner?
Common causes of P1604 include: Fuel delivery issue, Ignition problem, Air leak, Low compression.