P2438: Secondary Air Injection System Air Flow Pressure Sensor Circuit High Bank 2
What to do
The car drives normally. If work has recently been done around the exhaust manifold on this side, ask for the connector to be checked first.
What this code means
The bank 2 secondary air flow sensor circuit reads above its valid range — an open circuit, a disconnected sensor, or a short to supply. A disconnected sensor is common because this hardware is disturbed during exhaust manifold work; see P2433.
Likely causes
Start here
- Open circuit in sensor wiring · moderate
- Disconnected sensor connector · easy
- Corroded or loose connector · easy
Less common
- Faulty secondary air flow sensor · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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