I came across a steal on a 2001 Z06 corvette but have some questions. The check engine light is on and it has a code P1416 Air System Fault in Bank 2.

I was wondering if any of you guys have come across this code yet and if so what did it turn out to be?

Any other known issues I need to look at before I pick this thing up?

I currently own a 1998 coupe but Im loving the power of this Z so I cant pass it up. Thanks in advance fellas.

Chris

 

check valve is stuck. use the search function & type in the code... you'll find all you need to know...

 

gotta say

 

Check for rocking seats, rear differential seal leaks, and find out if a column lock bypass has been installed. Good luck if you decide to get the car.

 

P1416 is caused by a stuck AIR system check valve, there are 2. You can leave it be without any worries, or change out the valves. One is almost impossible to get to without removing the manifold. The code comes up regularly in the winter, almost never in the summer

The preceeding information was found at corvettemechanic.com

 

Posted by Bill Dearborn on another thread:
What you asked for:
DTC P1415 or P1416

Circuit Description
The secondary air injection (AIR) pump system is designed to lower exhaust emission levels after a start up. The AIR pump is timed to remain ON for approximately 1 minute after the engine is started.
The powertrain control module (PCM) commands the AIR pump relay ON by supplying a ground to the AIR pump relay control circuit. This action energizes the AIR pump, forcing fresh air into the exhaust stream. The PCM also commands the AIR vacuum control solenoid ON which applies engine vacuum to the AIR shut-off valve. With vacuum applied to the AIR shut-off valve, airflow from the AIR pump flows through the pipes/hoses to the exhaust check valves, then enters into the exhaust stream. The air, oxygen, that is introduced into the exhaust system accelerates catalyst operation. When inactive, the check valves and the shut-off valve prevent air flow in either direction.
The PCM detects a system air flow condition by monitoring the heated oxygen sensors (HO2S) and Short Term Fuel Trim during normal Open Loop AIR system operation. This is called a passive test. If the passive test indicates a pass, the PCM takes no further action. If the passive test fails or is inconclusive, the diagnostic will proceed with an intrusive or active test. The PCM will command the AIR system ON during Closed Loop operation under normal operating conditions. The active test will pass or fail based on the response from the HO2S. A lean HO2S response indicates that the AIR system is functioning normally. An increasing Short Term Fuel Trim value also indicates a normal functioning system. The AIR diagnostic consists of the passive test and the active tests. The AIR diagnostic requires failure of the passive and active tests on 2 consecutive key cycles to illuminate the malfunction indicator lamp (MIL) and stores a DTC. If the PCM detects that the HO2S and Short Term Fuel Trim did not respond as expected on one of the engine banks, DTC P1415 or P1416 sets.

Conditions for Running the DTC
· DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0125, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0151, P0154, P0155, P0157, P0158, P0160, P0161, P0171, P0172, P0174, P0175, P0200, P0300, P0335, P0336, P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358, P0440, P0442, P0443, P0446, P0449, P1120, P1133, P1134, P1153, P1154, P1220, P1221, P1258, P1441 are not set.
· The engine is running for more than 30 seconds.
· The mass air flow (MAF) is less than 23 g/s.
· The air/fuel ratio is 14.7:1.
· The engine load is less than 40 percent.
· The ignition voltage is more than 11.7 volts.
· The engine is not operating in the Power Enrichment, the Decel Fuel Shut-off, or the Catalyst Over-Temperature Modes.
· The engine speed is more than 850 RPM.
· The engine coolant temperature (ECT) is between -10 and +110°C (14-230°F) .
· The intake air temperature (IAT) is between -10 and +100°C (14-212°F) .
· The fuel system is operating in fuel trim cells 1, 2, 4, 5, or 6.

Conditions for Setting the DTC
The HO2S voltage does not decrease to less than 222 mV for 1.3 seconds.
OR
The short-term fuel trim does not change more than a predetermined value.

Action Taken When the DTC Sets
· The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

Thanks,Matt

 

Wow! Once again, I am amazed at how generous you guys are. In just a manner of a few posts, so much information. This forum ROCKS!

 

I also got this code last winter. This is the one that is hard to get to. It is between the engine and firewall in the middle. Take the hose loose on the driver side that goes to it and spray pretty heavy with carb cleaner that is oxygen sensor safe. May free it up. Did on mine. No more problems so far!