How do you fix a P0411 code on a 2006 Pontiac Grand Prix. Trouble code P0411 means: Secondary Air Injection (AIR) System Insufficient Air Flow Detected.
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What the P0411 code means. P0411 indicates that the ECU has detected the flow from the secondary air injection system to be out-of-specification. This causes the Check Engine Light to be set and displayed on the dashboard.
Detailed information on troubleshooting and repairing a P0411 DTC code which has to do with the secondary air ... OBD-II Trouble Code Technical Description.
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https://www.youtube.com/watch?v=x2ul9mbEFZM
Oct 1, 2012 - Uploaded by Keelan Hawkins
VW Emissions Code P0411. .... VW 1.8T Secondary Air Injection Pump Replacement for Fault Code P0411 - Duration: 8:48. by Deutsche Auto ...
P0411 Chevrolet - Secondary Air Injection System Insufficient Flow
Possible causes
- Vacuum hoses damaged or pinched
- Faulty Air Pump inoperative
- Faulty Air Pump harness is open or shorted
- Faulty Air Pump circuit poor electrical connection
What engine ? 3.8 or 5.3 L
DTC P0128: Engine Coolant Temperature (ECT) Below Thermostat Regulations Temperature
DTC P0411 : Secondary Air Injection (AIR) System Incorrect Air Flow Detected
DTC P2440 : Secondary Air Injection (AIR) Valve Stuck Open
DTC P2431 : Secondary Air Injection (AIR) System Pressure Sensor Performance
Circuit/System Description
The secondary air injection (AIR) system aids in the reduction of hydrocarbon emissions during a cold start. The system forces fresh filtered air into the exhaust stream in order to accelerate the catalyst operation. An electric air pump, the secondary AIR injection pump, provides filtered air on demand to the AIR control solenoid valve/pressure sensor assembly. The AIR control solenoid valve/pressure sensor assembly controls the flow of air from the AIR pump to the exhaust manifold. The AIR solenoid valve relay supplies the current needed to operate the AIR solenoid valve/pressure sensor assembly. A pressure sensor is used to monitor the air flow from the AIR pump. The powertrain control module (PCM) supplies the internal pressure sensor with a 5-volt reference, an electrical ground, and a signal circuit.
The AIR diagnostic uses 3 phases to test the AIR system:
DTCs P0411 and P2430 run during Phase 1
DTCs P2430 and P2440 run during Phase 2
DTC P2444 runs during Phase 3
During phase 1, both the AIR pump and the solenoid valve are activated. Normal secondary air function occurs. Expected system pressure is 8-10 kPa above BARO.
During phase 2, only the AIR pump is activated. The solenoid valve is closed. Pressure sensor performance and solenoid valve deactivation are tested. Expected system pressure is 15-20 kPa above BARO.
During phase 3, neither the AIR pump nor the solenoid valve is activated. AIR pump deactivation is tested. Expected system pressure equals BARO.
In all 3 phases, testing is accomplished by comparing the measured pressure against the expected pressure. The PCM can detect faults in the AIR pump, AIR solenoid valve/pressure sensor assembly, and the exhaust check valve. The pressure sensor can also detect leaks and restrictions in the secondary AIR system plumbing.
P2440 refers to the Secondary Air Injection system. It means that the switching valve is stuck open. We already replaced the secondary air flow pump, now it's telling us that's its the secondary air flow sensor and the valve is stuck open. the code is coming up P2440
P2430 Secondary Air Injection System Air Flow/Pressure Sensor Circuit, The AIR diagnostic uses 3 phases to test the AIR system:
DTCs P0411 and P2430 run during Phase 1 DTCs P2430 and P2440 run during Phase 2 DTC P2444 runs during Phase 3 During phase 2, only the AIR pump is activated. The solenoid valve is closed, this is p2430 and p2440. -The AIR system pressure sensor is stuck. good-day !!
P0411 is The Secondary Air Injection system. It is used on cold starts to run fresh air into the exhaust to help fire the cat up.
Look around for a broke hose that goes from the intake system to the exhaust that is controlled by a solenoid.
Their are three phases that will trigger codes your code is phase 1 of the systems operation.
I would take the vehicle to a shop to have this serviced. Or you can ignore the code. Their wont be any detrimental affect other than if you have smog or e-check your car will fail.
Secondary Air Injection System Incorrect Flow Detected, what does this mean? you need to replace the secondary air injection check valve, when u buy the part from the local GM dealer ask him or her to give u a print out of the location from the parts diagram reference book, they almost always will, the part is about $100
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