Start-Stop Climate Control Compensation Fault
2014-2014 Cadillac ATS 3.6L V6
The 2014 Cadillac ATS is equipped with a 3.6L V6 engine. Below you'll find detailed p3605 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
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 2014-2014 Cadillac ATS?
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 Cadillac ATS?
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 2014-2014 Cadillac ATS?
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.
Last updated: March 2026