At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
CODE PO411 - SECONDARY AIR SYSTEM INCORRECT UPSTREAM FLOW DETECTED. POSSIBLE CAUSES, AIR PUMP OUTPUT IS BLOCKED, AIR BYPASS SOLENOID LEAKING OR BLOCKED, AIR BYPASS SOLENOID IS STUCK OPEN OR STUCK CLOSED. AIR INJECTION PUMP HOSES LEAKING, PCM HAS FAILED.
P0411 is Secondary Air Injection (AIR) Incorrect Air Flow Detected. Without knowing what year/Model and engine you have it's a guess as to the proper fix.
This is a code related to the air flow from the air pump (aka pollution pump) into your exhaust system. This air pump takes outside air and injects it in the exhaust stream after the engine to help burn off any residual fuel or pollutants. When P0411 comes up, the control module detects a lack of air flow either caused by a defective air pump, leaking/clogged air hoses, or bad check valves.
The P0410 code refers to the emissions system. The AIR pump puts air to the
exhaust to lower emissions. It takes in outside air and pumps it through two
one-way check valves into each bank of the exhaust.
About 90% of the time that this code is set, the one-way check valves have
worn out or failed and allow water (which occurs naturally in the exhaust) back
into the pump. In any cold climate, especially in climates with higher humidity,
this water may be more excessive. The water partially fills the AIR pump, it
can then freeze. When the PCM commands the pump on, if the pump is frozen it
cannot turn, thus overloading the circuit and "popping" the fuse.
In here you can find the Trouble Codes List: The CODE mean P0411 Secondary Air Injection System Incorrect Flow Detected
×