P0413

Code

Generic P — Powertrain

AIR System Switching Valve A Circuit Open

Brand: Generic

Type: P — Powertrain

Views: UK: 35 EN: 64 RU: 53

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Blown fuse or open relay for AIR pump/solenoid circuit
Broken, corroded or disconnected wiring or connector to Switching Valve A
Failed AIR switching valve (open coil)
Poor or missing ground at valve or control circuit
Faulty PCM or internal driver (less common)

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Reduced or no secondary air injection during cold start
Possible failed emissions test
Rough or uneven cold idle (less common)
Possible stored secondary AIR related freeze-frame data

What to check

Retrieve freeze frame and live data with a scan tool; confirm code and related AIR codes
Visually inspect fuse(s) and relay(s) for the AIR system
Inspect wiring harness and connector at Switching Valve A for corrosion, damage, or disconnection
Backprobe valve connector while commanding valve with a scan tool to observe voltage/ground
Measure coil resistance of the switching valve with the connector disconnected
Check continuity between the valve connector and the PCM pin for the control and ground circuits

Signal parameters

Supply/reference voltage to valve: typically battery voltage (~12 V) when fused power present
Control signal: driver may switch to ground or supply depending on design — expected toggling when commanded
Typical solenoid coil resistance (varies by vehicle): commonly ~6–35 ohms (verify with OEM spec)
Expected current draw when energized: typically
Open-circuit condition: infinite resistance at coil, or 0 V/ground change at connector when commanded

Diagnostic algorithm

Verify stored code(s) and any freeze-frame data. Note P0413 and related AIR codes (P0410/P0411/P0412/P0414).
Perform a visual inspection: check fuses, AIR pump/valve relay, wiring harness routing, and valve connector for damage or corrosion.
With ignition OFF, disconnect the switching valve and measure coil resistance. If infinite/open, replace valve.
With connector disconnected, verify fused supply voltage at the valve power pin (key ON). Replace fuse/relay if no power.
Command the valve ON with a bi-directional scan tool while backprobing the control pin. Observe for switching voltage or ground change.
If no change when commanded, check continuity between the PCM control pin and the valve connector. Repair any open wiring or poor connections.
Check ground integrity at valve ground and at PCM ground circuits; repair if high resistance or intermittent.
If wiring and valve are good but control still absent, test or substitute the relay (if used) and re-test.
If wiring, relay and valve check good and PCM does not command, consider PCM driver fault — consult manufacturer procedures before replacement.
After repair, clear codes, perform a key-on/engine-start test and verify proper valve operation and that code does not return; road test as required for readiness monitors.

Likely causes

Open or corroded connector at the switching valve
Open fuse or relay in the AIR/solenoid circuit
Wiring open or damaged (pinched, chafed, broken)
Defective switching valve coil (open resistance)

Fault status

⚠️ Status

P0413 — AIR System Switching Valve A Circuit Open: Open or disconnected electrical circuit to the secondary air switching valve A. Inspect fuse/relay, wiring, connector, valve coil and PCM driver.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.5 hours