Intelligent Battery Sensor (IBS) Circuit Malfunction
2009-2015 Audi TT 3.2L V6
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
Common Questions
What does code P3602 mean on a 2009-2015 Audi TT?
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 Audi TT?
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 2009-2015 Audi TT?
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.