P0419
Secondary Air Injection System Relay B Circuit Malfunction
Generic code
Auxiliary Emissions Control
Medium severity
Moderate repair
Free on OBD DashX
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What P0419 means
- The fault code P0419 indicates that there is a malfunction in the secondary air injection system relay B circuit. This may cause the vehicle to produce higher emissions or fail to meet emissions requirements.
Possible symptoms
- Illuminated check engine light
- Failed emissions test
- Rough engine running
- Reduced engine power or acceleration
Possible causes
- Damaged or faulty secondary air injection system relay B
- Open or short circuit in the wiring of secondary air injection system relay B
- Failed engine control module (ECM)
- Poor electrical connections
Related parts
- Exhaust Pipe Air Injection: Air is injected into the exhaust gases for better combustion of unburnt fuel and pollutants. This allows better exhaust emission. Problems lead to harmful emissions out of limit
Possible solutions
- Replace damaged or faulty secondary air injection system relay B
- Check and repair any open or short circuit in secondary air injection system relay B wiring
- Tighten or clean any loose or corroded electrical connections
- Replace the engine control module (ECM) if necessary
Free on OBD DashX
P0419 on OBD DashX
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