oOoLy

My friend have camaro 1998 m6 with all free mod and short headers and only got this codes ( P0404 , P0420 , P0430 ) <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
So what is this mean ?
and what should i do with this codes ?

NOTE : I have record file( Auto Tap ) for this car !

Thanks
Adnan

CMNTMXR57

Here ya go

DTC P0404
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">DTC P0404 Exhaust Gas Recirculation (EGR) Open Position Performance

Circuit Description
The ability of the PCM to control the EGR valve is verified with this test. The PCM calculates an error based on the difference between the actual EGR position and the desired EGR position. The PCM sets this DTC if the error is too great.

Conditions for Running the DTC
- The ignition voltage is greater than 11.7 volts.
- The desired EGR position is greater than 0%.

Conditions for Setting the DTC
- The difference between the desired EGR position and the actual EGR position is greater than 20%.
- The failure counter is greater than a predetermined value.

Action Taken When the DTC Sets
- The PCM disables the EGR for the ignition cycle.
- The PCM illuminates the Malfunction Indicator Lamp 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 OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A last test failed, or current DTC, clears when the diagnostic runs and does not fail.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Use a scan tool in order to clear the MIL and the DTC.

Test Description

The numbers below refer to the step numbers on the Diagnostic Table.

2) This step determines if the EGR valve can be commanded open.

3) Excessive resistance in the EGR control circuit or the EGR ground circuit will result in the EGR not responding correctly to the commanded EGR position.

4) Inspect the PCM connector for poor connections.

5) Inspect the PCM connector for poor connections.

6) Excessive resistance in the control circuit or the ground circuit will cause this DTC to set. With the EGR commanded to 100% the test lamp should light with full intensity. Connect the test lamp across the battery terminals and compare the test lamp intensity to the EGR control circuit intensity.

Step 1
Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?
--
Yes: Go to Step 2
No: Go to Powertrain On Board Diagnostic (OBD) System Check

Step 2
1) Idle the engine.
2) Command the EGR valve to 50% using the scan tool.

Does the engine run rough or stall?
--
Yes: Go to Step 3
No: Go to Step 6

Step 3
1) Idle the engine.
2) Command the EGR valve to 50% using the scan tool.
3) Monitor the Actual EGR position on the scan tool.

Is the Actual EGR Position within the specified range?

Specified Range = 48-52%
--
Yes: Go to Diagnostic Aids
No: Go to Step 4

Step 4
1) Turn OFF the ignition.
2) Disconnect the PCM connector C2. Refer to PCM Replacement/Programming .
3) Disconnect the EGR valve electrical connector.
4) Test the continuity of the EGR valve control circuit using the DMM J 39200 . Refer to Testing for Continuity in Wiring Systems.

Is the resistance within the specified range?

Specified Range = 0-2ohms
--
Yes: Go to Step 5
No: Go to Step 14

Step 5
Test the continuity of the EGR valve ground circuit using the DMM J 39200 . Refer to Testing for Continuity in Wiring Systems.

Is the resistance within the specified range?

Specified Range = 0-2ohms
Yes: Go to Step 16
No: Go to Step 15

Step 6
1) Turn OFF the ignition.
2) Disconnect the EGR valve electrical connector.
3) Probe the EGR control circuit using the test lamp J 34142-B connected to ground. Refer to Probing Electrical Connectors in Wiring Systems.
4) Turn ON the ignition.
5) Command the EGR to the specified value using the scan tool.

Is the test lamp illuminated? 100%
--
Yes: Go to Step 7
No: Go to Step 8

Step 7
Probe the EGR ground circuit using the test lamp J 34142-B connected to B+. Refer to Probing Electrical Connectors in Wiring Systems.

Is the test lamp illuminated?
--
Yes: Go to Step 16
No: Go to Step 11

Step 8
1) Turn OFF the ignition.
2) Disconnect the PCM connector C2. Refer to PCM Replacement/Programming .
3) Test the continuity of the EGR valve control circuit using the DMM J 39200 . Refer to Testing for Continuity in Wiring Systems.

Does the DMM display continuity?
--
Yes: Go to Step 9
No: Go to Step 12

Step 9
Test the continuity of the EGR valve control circuit using the DMM J 39200 connected to ground. Refer to Testing for Continuity in Wiring Systems.

Does the DMM display continuity?
--
Yes: Go to Step 12
No: Go to Step 10

Step 10
Test for continuity from the EGR control circuit to all other circuits in the PCM harness connector. Refer to Testing for Continuity in Wiring Systems.

Does the DMM display continuity to any other circuit in the PCM harness connector?
--
Yes: Go to Step 12
No: Go to Step 18

Step 11
1) Turn OFF the ignition.
2) Disconnect the PCM connector C2. Refer to PCM Replacement/Programming .
3) Test the continuity of the EGR valve ground circuit using the DMM J 39200 . Refer to Testing for Continuity in Wiring Systems.

Does the DMM display continuity?
--
Yes: Go to Step 18
No: Go to Step 13

Step 12
Repair the open or short to ground in the EGR valve control circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?
--
Yes: Go to Step 20

Step 13
Repair the open in the EGR valve ground circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?
--
Yes: Go to Step 20

Step 14
Repair the high resistance in the EGR valve control circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?
--
Yes: Go to Step 20

Step 15
Repair the high resistance in the EGR valve ground circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?
--
Yes: Go to Step 20

Step 16
1) Inspect for poor connections at the EGR valve electrical connector. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.
2) If you find a poor connection repair the terminal as necessary. Refer to Repairing Connector Terminals in Wiring Systems.

Did you find and correct the condition?
--
Yes: Go to Step 20
No: Go to Step 17

Step 17
Replace the EGR valve. Refer to Exhaust Gas Recirculation (EGR) Valve Replacement .

Is the replacement complete?
--
Yes: Go to Step 20

Step 18
1) Inspect for a poor connection at the PCM. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.
2) If you find a poor connection repair the terminal as necessary. Refer to Repairing Connector Terminals in Wiring Systems.

Did find and correct the condition?
--
Yes: Go to Step 20
No: Go to Step 19

Step 19

Important:
Program the replacement PCM. Refer to PCM Replacement/Programming .

Replace the PCM.

Is the action complete?
--
Yes: Go to Step 20

Step 20
1) Select the Diagnostic Trouble Code (DTC) option and the Clear DTC option using the scan tool.
2) Idle the engine at the normal operating temperature.
3) Select the Diagnostic Trouble Code (DTC) option and the Specific DTC option, then enter the DTC number using the scan tool.
4) Operate vehicle within the Conditions for Running this DTC as specified in the supporting text, if applicable.

Does the scan tool indicate that this test passed?
--
Yes: Go to Step 21
No: Go to Step 2

Step 21
Select the Capture Info option and the Review Info option using the scan tool.

Does the scan tool display any DTCs that you have not diagnosed?
--
Yes: Go to applicable DTC
No: System OK </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">DTC P0420
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">DTC P0420 Catalyst System Low Efficiency Bank 1
Circuit Description
In order to maintain a reasonably low emissions of Hydrocarbons (HC), Carbon Monoxide (CO), and Oxides of Nitrogen (NOx), the engine controls system uses a three-way catalytic converter. The catalyst within the converter promotes a chemical reaction which oxidizes the HC and CO present in the exhaust gas. This reaction converts them into harmless water vapor and Carbon Dioxide. The catalyst also reduces NOx, converting it to Nitrogen. The PCM monitors this process using Bank 1 HO2S #2. Bank 1 HO2S #2, located in the exhaust stream past the three-way catalytic converter, produces an output signal which indicates the oxygen storage capacity of the catalyst. This determines the catalysts ability to convert exhaust emissions effectively. If the catalyst is functioning correctly, the Bank 1 HO2S #2 signal will be far less active than that produced by Bank 1 HO2S #1. If a condition exists which causes the PCM to detect excessive Bank 1 HO2S #2 activity outside of an acceptable range for an extended period of time, the PCM will set DTC P0420. This indicates that the three-way catalytic converters oxygen storage capacity is below a threshold considered acceptable.

Conditions for Running the DTC
- No AIR, CKP, CMP, IAT, IC, MAF, MAP, ECT, TP, EVAP, Left Bank HO2S, Misfire, Left Bank Fuel Trim, Injector, VSS, Engine Protection, or Transmission DTCs are set.
- The ECT is greater than 65°C (149°F).
- The vehicle speed is between 32 km/h (20 mph) and 136 km/h (85 mph).
- The IAT is greater than -30°C (-22°F).
- The TP sensor angle is greater than 2%.
- The engine speed is between 800 RPM and 3000 RPM.
- The MAP is between 25 kPa and 80 kPa.
- The engine air flow is between 14 g/s and 40 g/s.
- The fuel system is operating in closed loop fuel control.

Conditions for Setting the DTC
The PCM determines the oxygen storage capability of the catalytic converter has degraded below a calibrated threshold.

Action Taken When the DTC Sets
- The PCM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Freeze Frame and/or Failure Records.

Conditions for Clearing the MIL/DTC
- The PCM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A last test failed, or current DTC, clears when the diagnostic runs and does not fail.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Use a scan tool in order to clear the MIL and the DTC.

Test Description
The numbers below refer to the step numbers on the diagnostic table.

4) Before replacing the Three Way Catalytic Converter, correct any conditions which may have damaged the catalyst.


Step 1
Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?
--
Yes: Go to Step 2
No: Go to Powertrain On Board Diagnostic (OBD) System Check

Step 2
Yes: Are any other DTCs set?
--
Yes: Go to the applicable DTC table
No: Go to Step 3

Step 3
Inspect for the following conditions:

- Verify that the three-way catalytic converter is an original equipment part.
- Inspect the three-way catalytic converter for damage (dents, severe discoloration caused by excessive temperature, holes, etc.).
- Ensure that the internal three-way catalytic converter rattle caused by damaged catalyst is not present.
- Inspect the exhaust system for leaks, damage, or loose or missing hardware (area from converter to HO2S #2 primarily).
- Ensure that the HO2S #1 and the HO2S #2 are secure and that the pigtails and wiring are not damaged or contacting the exhaust.

Did you find and correct the condition?
--
Yes: Go to Step 5
No: Go to Step 4

Step 4
Replace the catalytic converter. Refer to Oxidation Catalytic Converter Replacement in Engine Exhaust.

Is the action complete?
--
Yes: Go to Step 5

Step 5
1) Select the Diagnostic Trouble Code (DTC) option and the Clear DTC Information option using the scan tool.
2) Idle the engine at the normal operating temperature.
3) Select the Diagnostic Trouble Code (DTC) option and the Specific DTC option, then enter the DTC number using the scan tool.
4) Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text, if applicable.

Does the scan tool indicate that this test ran and passed?
--
Yes: Go to Step 6
No: Go to Step 2

Step 6
Select the Capture Info option and the Review Info option using the scan tool.

Does the scan tool display any DTCs that you have not diagnosed?
--
Yes: Go to the applicable DTC table
No: System OK</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">DTC P0430 (same as P0420, just bank 2)
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">DTC P0430 Catalyst System Low Efficiency Bank 2
Circuit Description
In order to maintain a reasonably low emissions of Hydrocarbons (HC), Carbon Monoxide (CO), and Oxides of Nitrogen (NOx), the engine controls system uses a three-way catalytic converter. The catalyst within the converter promotes a chemical reaction which oxidizes the HC and CO present in the exhaust gas. This reaction converts them into harmless water vapor and Carbon Dioxide. The catalyst also reduces NOx, converting it to Nitrogen. The PCM monitors this process using Bank 2 HO2S #2. Bank 2 HO2S #2, located in the exhaust stream past the three-way catalytic converter, produces an output signal which indicates the oxygen storage capacity of the catalyst. This determines the catalysts ability to convert exhaust emissions effectively. If the catalyst is functioning correctly, the Bank 2 HO2S #2 signal will be far less active than that produced by Bank 2 HO2S #1. If a condition exists which causes the PCM to detect excessive Bank 2 HO2S #2 activity outside of an acceptable range for an extended period of time, the PCM will set DTC P0420. This indicates that the three-way catalytic converters oxygen storage capacity is below a threshold considered acceptable.

Conditions for Running the DTC
- No AIR, CKP, CMP, IAT, IC, MAF, MAP, ECT, TP, EVAP, Left Bank HO2S, Misfire, Left Bank Fuel Trim, Injector, VSS, Engine Protection, or Transmission DTCs are set.
- The ECT is greater than 65°C (149°F).
- The vehicle speed is between 32 km/h (20 mph) and 136 km/h (85 mph).
- The IAT is greater than -30°C (-22°F).
- The TP sensor angle is greater than 2%.
- The engine speed is between 800 RPM and 3000 RPM.
- The MAP is between 25 kPa and 80 kPa.
- The engine air flow is between 14 g/s and 40 g/s.
- The fuel system is operating in closed loop fuel control.

Conditions for Setting the DTC
The PCM determines the oxygen storage capability of the catalytic converter has degraded below a calibrated threshold.

Action Taken When the DTC Sets
- The PCM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Freeze Frame and/or Failure Records.

Conditions for Clearing the MIL/DTC
- The PCM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A last test failed, or current DTC, clears when the diagnostic runs and does not fail.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Use a scan tool in order to clear the MIL and the DTC.

Test Description
The numbers below refer to the step numbers on the diagnostic table.

4) Before replacing the three way catalytic converter, make sure that any conditions which may have caused the catalyst to be damaged have been corrected.

Step 1
Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?
--
Yes: Go to Step 2
No: Go to Powertrain On Board Diagnostic (OBD) System Check

Step 2
Are any other DTCs set?
--
Yes: Go to the applicable DTC table
No: Go to Step 3

Step 3
Inspect for the following conditions:

- Verify that the three-way catalytic converter is an original equipment part.
- Inspect the three-way catalytic converter for damage such as dents, severe discoloration caused by excessive temperature, holes, etc.
- Ensure that internal three-way catalytic converter rattle caused by damaged catalyst is not present.
- Inspect exhaust system for leaks, damage, or loose or missing hardware in the area from the converter to the HO2S #2 primarily.
- Ensure that the HO2S #1 and the HO2S #2 are secure and that their pigtails and wiring are not damaged or contacting the exhaust.

Did you find and correct the condition?
--
Yes: Go to Step 5
No: Go to Step 4

Step 4
Replace converter. Refer to Oxidation Catalytic Converter Replacement in Engine Exhaust.

Is the action complete?
--
Yes: Go to Step 5

Step 5
1) Select the Diagnostic Trouble Code (DTC) option and the Clear DTC Information option using the scan tool.
2) Idle the engine at the normal operating temperature.
3) Select the Diagnostic Trouble Code (DTC) option and the Specific DTC option, then enter the DTC number using the scan tool.
4) Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text, if applicable.

Does the scan tool indicate that this test ran and passed?
--
Yes: Go to Step 6
No: Go to Step 2

Step 6
Select the Capture Info option and the Review Info option using the scan tool.

Does the scan tool display any DTCs that you have not diagnosed?
--
Yes: Go to the applicable DTC table
No: System OK</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">