DTC P0412: Secondary Air Injection (AIR) System - Switching Valve A Circuit Malfunction
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P0412 - SECONDARY AIR INJECTION (AIR) SYSTEM - SWITCHING VALVE A CIRCUIT MALFUNCTION
| Description: | On the primary side of the AIR relay, open and short faults on the AIR command circuit are detected during normal operation by the powertrain control module (PCM) output driver. | ||
| Possible Causes: |
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| Diagnostic Aids: | A single open AIR component, solenoid, or relay on this multi-component circuit is not detected by a PCM output driver circuit, yet it generates DTC P0411 for a solenoid open or P2257 for a relay open. For intermittent faults use the AIR PCM output driver fault PID (AIRF) during a harness wiggle test with the AIR PCM output driver in OFF and ON states. The AIR PCM output driver fault PID AIRF instantly detects open circuits and shorts to ground with the PCM output driver off. The AIR PCM output driver fault PID AIRF instantly detects open circuits and shorts to ground with the PCM output driver off. The AIR PCM output driver fault PID AIRF instantly detects a short to voltage or low resistance load with the PCM output driver on. Use the OTM or OSC to toggle the PCM output driver from OFF to ON. Refer to OUTPUT TEST MODE (OTM) . |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to HM: Secondary Air Injection (AIR) System STEP HM1. | GO to HM: Secondary Air Injection (AIR) System STEP HM1. | GO to HM: Secondary Air Injection (AIR) System STEP HM9. |