Secondary Air Injection System Switching Valve Stuck Open Bank 1
2007-2007 Cadillac CTS 3.2L V6
The 2007 Cadillac CTS is equipped with a 3.2L V6 engine. Below you'll find detailed p2440 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The secondary air injection switching valve on bank 1 is stuck in the open position.
Symptoms
- Check engine light
- Failed emissions test
- Noise from air injection system
Common Causes
- Carbon deposits in valve
- Failed diaphragm
- Broken valve spring
- Vacuum supply issue
Diagnostic Steps
- Inspect valve operation
- Check vacuum supply
- Listen for air injection noise at idle
Repair Notes
Replace secondary air switching valve.
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
P2440 on Other Vehicles
Common Questions
What does code P2440 mean on a 2007-2007 Cadillac CTS?
P2440 stands for "Secondary Air Injection System Switching Valve Stuck Open Bank 1". The secondary air injection switching valve on bank 1 is stuck in the open position.
What are the symptoms of P2440 on a Cadillac CTS?
Common symptoms of P2440 include: Check engine light, Failed emissions test, Noise from air injection system.
What causes P2440 on a 2007-2007 Cadillac CTS?
Common causes of P2440 include: Carbon deposits in valve, Failed diaphragm, Broken valve spring, Vacuum supply issue.
Last updated: March 2026