DTC P0410. Chevrolet Corvette 2003

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 Corvette 🢒 Engine 🢒 Engine Controls - 5.7L 🢒 DTC P0410

Circuit Description

The secondary air injection (AIR) System is designed to lower exhaust emission levels on engine start up. The AIR pump runs for approximately 1 minute or until Closed Loop is attained.

The powertrain control module (PCM) commands the AIR pump relay ON by supplying a ground on the relay control circuit. This action energizes the AIR pump, forcing air into the exhaust stream. The PCM also commands the AIR vacuum control solenoid valve ON, which applies engine vacuum to the AIR shut-off valve. When vacuum is applied to the AIR shut-off valve, airflow from the AIR pump flows through the pipes/hoses to the exhaust check valves. The air then enters the exhaust stream. The air that is introduced into the exhaust system decreases the time it takes for the convertor to begin its process of converting the incomplete gases; reducing exhaust emission levels. When inactive, the check valves and the shut-off valve prevent airflow in either direction.

The PCM detects a system airflow problem by monitoring the heated oxygen sensors (HO2S) and Short Term Fuel Trim during normal 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 secondary AIR system is functioning normally. An increasing Short Term Fuel Trim value also indicates a normally 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 MIL and store a DTC. If the PCM detects that the HO2S and Short Term FT did not respond as expected on one of the engine banks, DTC P0491 or P0492 sets. If the PCM detects that the HO2S and Short Term FT did not respond as expected on both of the engine banks, DTC P0410 sets.

Conditions for Running the DTC

•

DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0125, P0128, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0151, P0152, P0153, P0154, P0155, P0157, P0158, P0160, P0161, P0171, P0172, P0174, P0175, P0200, P0300, P0335, P0336, P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358, P0455, P0442, P0443, P0446, P0449, P1120, P1133, P1134, P1153, P1154, are not set.

•	The fuel level is more than 12.5 percent but less than 87.5 percent.

•	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 vehicle speed is more than 15 km/h (25 mph).

•	The engine is operating in a Closed Loop for more than 15 seconds.

•	The engine speed is more than 850 RPM.

•	The engine coolant temperature (ECT) is between than -10°C and +110°C (14-230°F).

•	The intake air temperature (IAT) is between -10°C and +100°C (14-212°F).

•	The fuel system is operating in fuel trim cells 1, 2, 4, or 5.

•	The Short Term FT is between -4 and +4 percent.

•	The start-up engine coolant temperature is less than 70°C (158°F).

•	The engine is not operating in any of the following modes:

-	Power enrichment

-	Decel fuel cut-off mode

-	Catalyst over temperature

Conditions for Setting the DTC

When the AIR pump is commanded ON, during Closed Loop operation and the HO2S voltages do not decrease below 222 mV for 1.5 seconds.

AND

The Short-Term FT does not change more than a predetermined amount.

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.

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

Important:

•

When commanding the AIR system ON with a scan tool the PCM will activate the AIR pump and the AIR solenoid. The fuel control system will then enter an open loop status. This action will allow fresh air to enter the exhaust stream and cause the front HO2S mV parameters to drop to near zero (0) mV. This would indicate a properly operating system.

However if the AIR pump does not operate or there is no airflow from the pump entering the exhaust stream due to a leak in the system, the HO2S parameter may still drop below 100 mV. This is due to fresh air being drawn into the exhaust stream from the check valve operation and the opening of the shut-off valve. The HO2S will respond with a drop in mV readings as a result of this air leaning out the exhaust gases. The voltages may drop to below 100 mV but not approach the near zero (0) mV parameter.

•	An AIR pump which exhibits an exhaust noise through the pump may have an AIR solenoid or AIR shut-off valve stuck open. The Short Term Fuel Trims may indicate a higher than normal value. This condition may not set DTC P0410.

•	An AIR shut-off valve that has become inoperative and has shown indications of exhaust gases in the outlet port, or heat damaged hoses may indicate an exhaust check valve failure.

•	For any test that requires probing the PCM harness connector or probing a component harness connector, use the J 35616 Connector Test Adapter Kit . Using this kit prevents damage to the component terminals and to the harness. Refer to Using Connector Test Adapters in Wiring Systems.

AIR Pump Relay Underhood Electrical Center Terminal Identification
Front of Vehicle
Left Side of Vehicle	Ignition 1 voltage	Battery positive voltage	Right Side of Vehicle
Left Side of Vehicle	Pump Supply	Control	Right Side of Vehicle

•	For an intermittent condition, refer to Intermittent Conditions .

•	The vacuum lines at the AIR solenoid cannot be reversed, this condition may hold the shut-off valve open continually.

•	An AIR solenoid leaking vacuum will hold the shut-off valve open an exhaust noise may be heard through the air cleaner. Fuel Trims values may also indicate a higher than normal value at idle. This DTC may not set.

•	Leaking exhaust check valves will leave traces of exhaust carbon in the AIR system, with a possibility of heat damage to the hoses and AIR shut-off valve.

•	An intermittent may be caused by any of the following conditions:

-	Low system air flow

-	Excessive exhaust system back pressure

-	Moisture, water or debris ingested into the AIR pump

-	Pinched, kinked, heat damaged, or deteriorated pipes/hoses or vacuum hoses.

-	Restrictions in the pump inlet, duct, or filter

Step

Action

values

Yes

Schematic Reference: Engine Controls Schematics

Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views

Did you perform the Diagnostic System Check-Engine Controls?

Go to Step 2

Go to Diagnostic System Check - Engine Controls

Is DTC P0412 or DTC P0418 also set?

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

Turn ON the ignition, with the engine OFF.
Command the AIR pump relay ON and OFF with a scan tool.

Does the AIR pump turn ON and OFF with each command of the scan tool?

Go to Step 4

Go to Step 6

Start and Idle the engine until Closed Loop is achieved.
Observe the Long Term Fuel Trim parameter on the scan tool.

Is the parameter above the specified amount?

10%

Go to Step 5

Go to Step 17

Increase the engine speed to 1,500 RPM for 1 minute.

Is the parameter above the specified amount?

10%

Go to Fuel System Diagnosis

Go to Step 17

Inspect the AIR pump fuse.

Is the AIR pump fuse open?

Go to Step 7

Go to Step 11

Turn OFF the ignition.
Disconnect the AIR pump connector.
Connect a test lamp between the supply voltage circuit of the AIR pump harness connector and the ground circuit of the AIR pump at the harness connector.
Replace the AIR pump fuse.
Turn ON the ignition, with the engine OFF.
Command the AIR pump relay ON and OFF with a scan tool.

Does the test lamp turn ON and OFF with each command of the scan tool?

Go to Step 40

Go to Step 8

Does the test lamp remain illuminated when the air pump relay is commanded ON and OFF with a scan tool?

Go to Step 9

Go to Step 10

Remove the AIR pump relay.

Does the test lamp remain illuminated?

Go to Step 32

Go to Step 37

Remove the AIR pump relay. Refer to Relay Replacement in Wiring Systems.
Test the battery positive circuit switched side of the AIR pump relay between the AIR fuse and AIR pump relay for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct a condition?