Start-Stop Climate Control Compensation Fault
2014-2021 Mazda Mazda6 2.5L I4
Description
The auxiliary systems that maintain cabin comfort during engine-off periods (electric A/C compressor or thermal storage) are not functioning.
Symptoms
- Start-stop deactivates quickly in hot/cold weather
- Cabin temperature drifts rapidly during stops
- A/C blows warm air at stops
- Start-stop durations very short
- Reduced fuel savings from start-stop
Common Causes
- Electric A/C compressor failure
- Thermal storage evaporator issue
- Auxiliary coolant pump fault
- Electric heater element failure
- Control module communication error
Diagnostic Steps
- Check auxiliary A/C compressor operation during engine stop
- Monitor cabin temperature drift rate
- Test auxiliary coolant pump
- Check electric heater circuit
- Monitor start-stop inhibit reasons
Repair Notes
Replace auxiliary A/C compressor or electric heater. Repair auxiliary coolant pump if cabin heating affected.
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
P3605 on Other Vehicles
Common Questions
What does code P3605 mean on a 2014-2021 Mazda Mazda6?
P3605 stands for "Start-Stop Climate Control Compensation Fault". The auxiliary systems that maintain cabin comfort during engine-off periods (electric A/C compressor or thermal storage) are not functioning.
What are the symptoms of P3605 on a Mazda Mazda6?
Common symptoms of P3605 include: Start-stop deactivates quickly in hot/cold weather, Cabin temperature drifts rapidly during stops, A/C blows warm air at stops, Start-stop durations very short, Reduced fuel savings from start-stop.
What causes P3605 on a 2014-2021 Mazda Mazda6?
Common causes of P3605 include: Electric A/C compressor failure, Thermal storage evaporator issue, Auxiliary coolant pump fault, Electric heater element failure, Control module communication error.