P044F
PPowertrainSecondary Air Switching Valve A Circuit High
What does this code mean?
Severity : LowP044F indicates a high voltage on the secondary air injection system switching valve A circuit. This system blows fresh air into the exhaust during a cold start so the catalytic converter heats up faster. The module detects an abnormal signal, often an open circuit or a short to voltage.
Symptoms
- Check engine light on.
- No driveability symptoms in most cases.
- Higher emissions during cold start.
- Possible emissions test failure.
Possible causes
- Faulty switching valve A.
- Wire open or shorted to voltage.
- Corroded connector.
- Faulty secondary air relay.
- Faulty control module, less often.
Diagnosis and repair
- Inspect the valve connector and wiring.
- Measure the valve coil resistance with a multimeter.
- Check valve supply and command with a scan tool.
- Replace the valve or repair the wiring.
- Clear the code and verify on the next cold start.
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Code
P044F
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012