I took a PCM(Power Control Module) P1416 and the check engine light came
on. It had H(history) and C(current) at the end.

Also had IPC(Instrument Pannel Cluster) B0516 H and U1160 H

Can anybody tell me what these codes mean?

Thank in advance !! Clark

 

DTC P1415 or P1416
Circuit Description
An AIR pump is used on this vehicle to lower tail pipe emissions on start-up. The powertrain control module (PCM) supplies a ground to the AIR pump relay, which energizes the AIR pump.

The PCM monitors the heated oxygen (HO2S) sensor voltages in order 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 the 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 1 sensor responded, the PCM sets either a DTC P1415 for bank 1 or P1416 for bank 2 in order to indicate on which bank the AIR system is inoperative.

Conditions for Running the DTC
DTCs P0101-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 the HO2S DTCs are not set.
The engine is running for more than 30 seconds.
The maximum air flow is 22 g/s.
The air/fuel ratio is 13.125:1
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°C (+14°F) and 110°C (230°F).
The intake air temperature (IAT) is between -10°C (+14°F) and 100°C (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 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 control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.

Conditions for Clearing the MIL/DTC
The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
Remove any debris from the powertrain control module/throttle actuator control module (PCM/TAC) connector surfaces before servicing the PCM/TAC module. Inspect the PCM/TAC module connector gaskets when diagnosing or replacing the modules. Verify that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the PCM/TAC modules.
For any test that requires probing the PCM or probing a component harness connector, use the connector test adapter kit J 35616-A . Using this kit prevents damage to the harness or component terminals. Refer to Using Connector Test Adapters in Wiring Systems.
Carbon build-up in the exhaust manifold may restrict the amount of air flow necessary to affect the HO2S voltage. If you suspect this condition, remove the air pipe from the manifold and inspect the passage.

DTC B0516
Circuit Description
The instrument panel cluster (IPC) receives vehicle speed information from the powertrain control module (PCM). The IPC receives a 4000 pulse-per mile vehicle speed sensor (VSS) input over a dedicated input from the PCM. The PCM is responsible for processing the VSS data and sending it to the IPC. The IPC monitors the VSS output information sent from the PCM for an out of range condition.

Conditions for Setting the DTC
The IPC detects that the vehicle speed is over 322 km/h (200 mph).
The above condition must be present for 1 second.
Action Taken When the DTC Sets
The IPC stores DTC B0516.
The IPC displays vehicle speed at 322 km/h (200 mph).
Conditions for Clearing the DTC
The IPC detects that the vehicle speed is less than 322 km/h (200 mph).
A history DTC clears after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
The code is cleared using on-board diagnostics.
The IPC receives a clear code command from the scan tool.
Diagnostic Aids
The following conditions may cause an intermittent malfunction to occur:
The PCM is unable to process the correct vehicle speed data sent from the VSS.
Intermittent or erratic VSS operation.




[Modified by kewlbrz, 11:01 AM 12/18/2002]

 

Wow! Thanks for all the detailed info Shawn !!

 

no problem. And I couldnt find a description for code 1160

 

All I know is that is says loss of communications with LDCM(Left Door Control Module).
Regarding all of these, I cleared them and will see if they occur again.
I know the B0516 was because I took her over 200mph (ha) I wish :D




[Modified by imxz28, 11:28 AM 12/18/2002]

 

Dont worry about loss of communications codes. Those happen from time to time on all C5's. It fundamentally means that some other computer bumped another on the communications bus with a priority, causing the other to have to lose its link, and resend later. No biggy.

 

God Bless America and this forum!!
Oh yeah, and Shawn!

(ha) good info!


[Modified by imxz28, 12:03 PM 12/18/2002]

 

Check your exhaust manifold bolts and AIR lines. If everything appears ok, you probably have a bad air check valve.

 

Hey Mike,
As luck would have it, I cleared the codes and on the way home I got the same error again.
QUESTION: Which one is bank 2, dirver or passenger side ???
Clark

 

passenger.

 

It's called the passenger side, but unfortuneately it's between the intake manifold and the firewall. :nonod:

 

The P1416 is a faulty "air check valve" on the right bank as stated.
Depending on who does the labor, it can be a bit costly (because many remove the intake manifold to get in there better); At Bill Heard, the tech had made himself a tool to get in there he told me.
The loss of comm. messages can be a result of a leaking battery getting acid down the PCM or BCM and nearby wiring. Good luck.