OBD-II Trouble Code

P0413

P0413 - Secondary Air Injection System Switching Valve A Circuit Open

P0413 Description

An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module PCM grounds the Air pump relay control circuit which energizes the Air pump. The PCM also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. The PCM enables both circuits simultaneously when Air system operations id desired. When the AIR system is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction.

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hesitation

When is the code detected?

The DTC P0413 is detected the the AIR vacuum control solenoid circuit not operating as desired by the PCM.

Possible Causes

- Air Pump inoperative.
- Air bypass solenoid circuit open or shorted.
- Faulty AIR byspass solenoid circuit

Possible Solution

- Visually inspect AIR pump harness and connector. Repair if necessary.
- Visually inspect AIR bypass valve harness and connector. Repair if necessary.
- Replaced AIR bypass valve
- Replaced Air pump

Editor Notes