P0418low severityPowertrain
Secondary Air Injection System Relay A Circuit Malfunction
on 2017 Maserati Levante 3.0L V6 Twin Turbo · AWD
What this code means
The PCM detected a fault in the secondary air injection pump relay A circuit. This relay powers the air pump used to reduce cold-start emissions.
Symptoms
- Check engine light on
- Air pump not running
- Failed emissions test
Common causes
- Faulty air pump relay
- Open or shorted relay wiring
- Blown fuse
- Faulty PCM driver
Diagnostic steps
- Scan and confirm P0418
- Test relay operation
- Check relay wiring and fuse
- Verify PCM control signal
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1