Enhanced Starter Motor Control Module Fault
2011-2011 Mitsubishi Lancer 2.0L I4
The 2011 Mitsubishi Lancer is equipped with a 2.0L inline-4 engine. Below you'll find detailed p3603 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The enhanced or reinforced starter motor used in start-stop systems has a control module fault. These starters are designed for frequent cycling.
Symptoms
- Start-stop disabled
- Slow cranking after stop event
- Starter noise during restart
- Unusual vibration during start
- Increased restart time
Common Causes
- Starter control module failure
- Starter motor brush wear
- Pinion gear engagement issue
- Starter solenoid degradation
- Excessive starter motor temperature
Diagnostic Steps
- Read starter motor cycle count
- Test starter motor current draw
- Check starter engagement speed
- Monitor starter solenoid operation
- Measure voltage drop across starter circuit
Repair Notes
Replace enhanced starter motor assembly. Standard starters are not suitable for start-stop equipped vehicles.
Related Codes
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
P3603 on Other Vehicles
Mitsubishi Colt JP
2010-2010 1.3L I4 4A90
Mitsubishi Colt JP
2010-2010 1.5L I4 4A91
Mitsubishi Colt JP
2011-2011 1.3L I4 4A90
Mitsubishi Colt JP
2011-2011 1.5L I4 4A91
Mitsubishi Colt JP
2012-2012 1.3L I4 4A90
Mitsubishi Colt JP
2012-2012 1.5L I4 4A91
Mitsubishi Delica D:5
2019-2019 2.2L I4 Turbo Diesel 4N14
Mitsubishi Delica D:5
2020-2020 2.2L I4 Turbo Diesel 4N14
Common Questions
What does code P3603 mean on a 2011-2011 Mitsubishi Lancer?
P3603 stands for "Enhanced Starter Motor Control Module Fault". The enhanced or reinforced starter motor used in start-stop systems has a control module fault. These starters are designed for frequent cycling.
What are the symptoms of P3603 on a Mitsubishi Lancer?
Common symptoms of P3603 include: Start-stop disabled, Slow cranking after stop event, Starter noise during restart, Unusual vibration during start, Increased restart time.
What causes P3603 on a 2011-2011 Mitsubishi Lancer?
Common causes of P3603 include: Starter control module failure, Starter motor brush wear, Pinion gear engagement issue, Starter solenoid degradation, Excessive starter motor temperature.
Last updated: March 2026