Auto Start-Stop System Malfunction
2012-2018 BMW 328i 2.0L Turbo I4
Description
The automatic engine start-stop system has been disabled due to a detected fault. The system shuts off the engine at stops to save fuel.
Symptoms
- Start-stop indicator shows fault
- Engine does not shut off at stops
- Start-stop disabled message on dash
- Slightly higher fuel consumption
- Start-stop light flashing
Common Causes
- Weak 12V battery
- Battery sensor failure
- Starter motor wear
- Engine temperature out of range
- Brake vacuum insufficient
Diagnostic Steps
- Read start-stop system status and inhibit reasons
- Test 12V battery state of health
- Check IBS (intelligent battery sensor)
- Monitor brake vacuum level
- Check starter motor engagement count
Repair Notes
Replace 12V battery if state of health is low. Register new battery with BMS. Replace IBS if faulty.
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
P3600 on Other Vehicles
Common Questions
What does code P3600 mean on a 2012-2018 BMW 328i?
P3600 stands for "Auto Start-Stop System Malfunction". The automatic engine start-stop system has been disabled due to a detected fault. The system shuts off the engine at stops to save fuel.
What are the symptoms of P3600 on a BMW 328i?
Common symptoms of P3600 include: Start-stop indicator shows fault, Engine does not shut off at stops, Start-stop disabled message on dash, Slightly higher fuel consumption, Start-stop light flashing.
What causes P3600 on a 2012-2018 BMW 328i?
Common causes of P3600 include: Weak 12V battery, Battery sensor failure, Starter motor wear, Engine temperature out of range, Brake vacuum insufficient.