P041F
Secondary Air Injection System Switching Valve A Circuit Low
Generic code
Auxiliary Emissions Control
Medium severity
Moderate repair
Free on OBD DashX
Want real-world data on P041F?
See which problems come with P041F, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P041F means
- Oxygen flow in the exhaust detected when air is injected in exhaust system is incorrect
Possible symptoms
- Check Engine Light/MIL will be on
Possible causes
- Bad one-way check valve in the air inlet
- Damaged wiring or connectors, or loose sensor connections
- Faulty system relay
- Faulty air injection pump or fuse
- Bad secondary air pressure sensor
- Significant vacuum leak
- Clogged secondary air injection ports
Related parts
- Air Injection System: Air is injected into the exhaust gases for better combustion of unburnt fuel and pollutants through air injectors. This allows better exhaust emission. Problems lead to harmful emissions out of limit
Possible solutions
- Give a visual inspection of the fan, its wiring and electrical connectors, associated fuses and the control relay
- If nothing looks to need repairs, then trigger the fan to power by either jumping the relay, sending 12 volts directly to the fan, or triggering it via the air conditioning
Free on OBD DashX
P041F on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P041F No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.