Intelligent Battery Sensor (IBS) Circuit Malfunction
2011-2011 Mitsubishi Lancer 2.4L I4
The 2011 Mitsubishi Lancer is equipped with a 2.4L inline-4 engine. Below you'll find detailed p3602 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The intelligent battery sensor that monitors 12V battery current, voltage, and temperature has a circuit fault. The IBS is critical for start-stop and energy management.
Symptoms
- Start-stop disabled
- Battery charge management affected
- Incorrect battery status display
- Alternator not properly regulated
- Parasitic draw calculation incorrect
Common Causes
- IBS sensor failure
- Corroded battery terminal affecting IBS
- IBS wiring damage
- Battery replaced without IBS re-registration
- IBS communication fault
Diagnostic Steps
- Read IBS data via scan tool
- Check IBS connector and mounting
- Test IBS communication on LIN bus
- Verify battery registration status
- Measure IBS signals vs actual battery parameters
Repair Notes
Replace IBS sensor if faulty. After battery replacement, always register new battery with the IBS/BMS system.
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
P3602 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 P3602 mean on a 2011-2011 Mitsubishi Lancer?
P3602 stands for "Intelligent Battery Sensor (IBS) Circuit Malfunction". The intelligent battery sensor that monitors 12V battery current, voltage, and temperature has a circuit fault. The IBS is critical for start-stop and energy management.
What are the symptoms of P3602 on a Mitsubishi Lancer?
Common symptoms of P3602 include: Start-stop disabled, Battery charge management affected, Incorrect battery status display, Alternator not properly regulated, Parasitic draw calculation incorrect.
What causes P3602 on a 2011-2011 Mitsubishi Lancer?
Common causes of P3602 include: IBS sensor failure, Corroded battery terminal affecting IBS, IBS wiring damage, Battery replaced without IBS re-registration, IBS communication fault.
Last updated: March 2026