Light came on today.... here are the codes it has stored. I have not cleared any since I have owned the car... (6 Months)

P1416HC Air sys bank 2 This is the only current one.
B2282H Batt 1 fault
B2283H Batt 1 fault
B2285H Batt 2 fault, DCM rt
B2253H Key Cyl Sw fault
U1016H Loss of Comm PCM
U1064H Loss of Comm BCM
U1255H Serial Data line Malfunc

I have cleared them and will see if any return. Is one of these the likely cause of the Check Eng LT? or maybe the gas cap routine? I appreciate your opinions.

Thanks

 

P1416HC Air sys bank 2 This is the only current one

That turns on the check engine light.
CIRCUIT DESCRIPTION
An AIR pump is used on this vehicle in order to lower the tail pipe emissions on start-up. The PCM supplies a ground to the AIR pump relay, which energizes the AIR pump.

The PCM monitors the HO2S voltages to diagnose the AIR system.

During the AIR test, the PCM activates the AIR pump during closed loop operation. When the AIR is activated, the PCM monitors the HO2S voltages and short term fuel trim values for both banks of the engine. If the AIR system is operating properly, the HO2S voltages should go low and the short term fuel trim should go high.

If the PCM determines that the HO2S voltages for both banks did not respond as expected during the tests, DTC P0410 sets. If only one sensor responded, the PCM sets either a DTC P1415 or P1416 to indicate on which bank the AIR system is inoperative.

CONDITIONS FOR RUNNING THE DTC


DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0125, P0171-P0175, P0200, P0300, P0335, P0336, P0351 -P0358, P0440, P0442, P0443, P0446, P0449, P1120, P1220, P1221, P1258, P1441 and HO2S DTCs are not set.
The engine is running for greater than 2.0 seconds .
The maximum air flow is 25 g/s .
The Air Fuel ratio is 14.7:1
The engine load is less than 34 percent.
The ignition voltage is greater than 11.7 volts .
Engine is not operating in Power Enrichment, Decel Fuel Shut-off, or Catalyst Over-Temperature Modes.
The engine speed is greater than 750 RPM .
The ECT is greater than 80°C (176°F) but less than 110°C (230°F) .
The IAT is greater than -2°C (28.40F) .
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 go below 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 PCM illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the PCM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the PCM records the operating conditions at the time of the failure. The PCM writes the conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC


The PCM turns the Malfunction Indicator Lamp (MIL) OFF after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A last test failed (current DTC) clears when the diagnostic runs and does not fail.
A History DTC clears after 40 consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures.
Use a scan tool in order to clear the MIL/DTC.

 

Very in depth answer, thank you.

It seems that the Air Pump has failed to test twice during starup (right bank). Any idea what the fix involves? Cost? If the gas cap leaks, the closed system will no longer be tight? Is this something that will affect how the car operates or a relatively minor pollution control issue? It is running nicely at the moment.

Thanks again... I appreciate the education, I love to know how these things work!

Dustie

 

Here is a detailed description of that error with possible problems and remedies.

You might want to check this thread as well:
http://forums.corvetteforum.com/show....php?t=1013057

 

Once again, thanks. The thread is very informative and some good pics. I started the car several times today and the light stayed off. If it come back, I'll replace the check valves that seem to be problematic. Learn something new every day.