Emission System Warranty?

Messages
2,095
Location
IL
I know there is a gov't mandated emission warranty period. Anyone know what that is for MY2001? I could call a dealership but I don't trust them, they may say I'm past it and hope I go away. On internet sites some say 50k, 88k, and 100k miles [Roll Eyes] I keep getting code P0420. I think the cat is toast. ~ 86-88k miles on a 2001 GTP. I thought it was 100k but can't find a definitive source. Nothing on pontiac site.
 
Messages
8,635
Location
Texas
As for the warranty on the cat, it is 8 years/80,000 miles. This is all in your owner's manual so you can prove it to the dealer if you had to. Maybe they will work with you since you are just out of warranty. Here you go for the code: Document ID# 671462 2001 Pontiac Grand Prix -------------------------------------------------------------------------------- DTC P0420 Circuit Description To control emissions of hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx), a 3-way catalytic converter is used. The catalyst within the converter promotes a chemical reaction which oxidizes the HC and CO present in the exhaust gas, converting them into harmless water vapor and carbon dioxide. The catalyst also reduces NOx, converting it to nitrogen. The converter also has the ability to store excess oxygen and release the stored oxygen to promote these reactions. This oxygen storage capacity (OSC) is a measurement of the catalysts ability to control emissions. The powertrain control module (PCM) monitors this process using a heated oxygen sensor (HO2S) located in the exhaust stream past the three-way converter. When the catalyst is functioning properly, the HO2S 2 is slow to respond to a large change in the HO2S 1 signal. When the HO2S 2 responds quickly to a large change in the HO2S 1 signal, the OSC and efficiency of the catalyst is considered to be bad and if subsequent tests also indicate a failure DTC P0420 will set. Conditions for Running the DTC Meet the conditions for engine warm up. Use the scan tool catalyst data list in order to verify the following: - DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0130, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0171, P0172, P0201-P0206, P0300, P0336, P0341, P0401, P0403, P0404, P0405, P0410, P0412, P0418, P0440, P0442, P0443, P0446, P0449, P0502, P0503, P0506, P0507, P1133, P1134, P1336, P1351, P1352, P1361, P1374, or P1441 are not set. - The engine has been running more than 10 minutes. - The engine coolant temperature (ECT) is above 70°C (158°F) and below 124°C (255°F). - The barometric pressure (BARO) is above 75 kPa. - The vehicle is in Closed Loop. - The intake air temperature (IAT) is above -20°C (-4°F), and is less than +100°C (+212°F). - The battery voltage above 10.7 volts Warm the catalyst. - Fully open the hood. - Transmission is in park (automatic) or neutral (manual). - Set the parking brake. - Press and hold the service brake. - Each time the engine is started the diagnostic can run up to 18 times. After the 10-minute run time and before the diagnostic runs the first time, the engine must run an additional 5 minutes between 1,500-2,500 RPM. Any additional tests on the same key cycle, the engine speed must be between 1,500-2,500 RPM for 1 minute. - To activate the diagnostic, return to idle and put the vehicle in drive (depress the clutch for manual). Test the catalyst. - Transmission is in drive (automatic) or neutral (for manuals with the clutch depressed). - VIN K California Emissions--Within 60 seconds the air fuel ratio will go rich below 14.1 for up to 6 seconds, then it may go lean above 15.3 for up to 8 seconds. - VIN K FED Emissions--Within 60 seconds the air fuel ratio will go lean above 15.3 for up to 6 seconds, then may go rich below 14.1 for up to 7 seconds. - VIN 1--Within 60 seconds the air fuel ratio will go rich below 14.1 for up to 7 seconds, then it may go lean above 15.3 for up to 9 seconds. - Check and see if DTC P0420 has passed or failed this key cycle using the scan tool. Conditions for Setting the DTC The PCM determines that the catalysts oxygen storage capacity is below a threshold considered acceptable. 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 • The PCM will NOT enable the catalyst test until following conditions are met: - The engine idle speed is within 150 RPM of the desired idle. - The throttle position is 1.5 percent or less. - The short term integrator is between -20 to +20 percent. • The catalyst test will abort if the vehicle falls outside the conditions listed below while the test is running: - The engine idle speed is within 300 RPM of the desired idle, or within 150 RPM for the w/67. - The throttle position is 1.5 percent or less. - The short term integrator is between -20 to +20 percent. • The catalyst test may abort due to a change in the engine load from the A/C, the coolant fan, or other components. If this condition occurs, use the scan tool to force the cooling fans ON, then return to Step 2 in the table. Important: When using a scan tool to command the cooling fans ON use the next list and previous list soft keys to enter the catalyst data list. If the catalyst data list is not entered this way the cooling fan control will be canceled. • The number of attempted tests is limited to 18 per key cycle. • More than 6 tests may have to be attempted to achieve 6 completed tests. An aborted test counts as an attempted test. • If 18 tests have been attempted, and a decision has not been made this key cycle, turn the key OFF for 30 seconds. Start the vehicle and perform the Conditions for Running the DTC, including the 10 minute engine run time. • After returning to an idle the HO2S 1 signal may stay rich or lean for several seconds causing the test to be delayed. If the condition is intermittent, refer to Intermittent Conditions . Test Description The numbers below refer to the step numbers on the diagnostic table. The Diagnostic System Check-Engine Controls prompts the technician to complete some basic tests and store the Freeze Frame/Failure Records data on the scan tool, if applicable. If any component DTCs are set, diagnose those DTCs first. A fault in a component can cause the converter to appear degraded or may have caused its failure. Clearing the DTCs allows the catalyst test to be tested up to 18 times and completed up to 6 times this ignition cycle. If the A/C is not turned OFF the diagnostic may not run. The engine must be warm. Warm the converter by raising the engine speed above idle for the specified time prior to each attempted test. Has the DTC passed or failed this ignition cycle? If the DTC does not pass or fail look for a possible reason that would cause the test to abort. This step includes tests for conditions that can cause the 3-way converter to appear degraded. Repair any conditions before proceeding with this table. If the 3-way converter needs to be replaced, ensure that another condition which could damage the converter is not present. These conditions may include misfire, leaking or plugged fuel injectors, high engine oil or coolant consumption, retarded spark timing, or weak spark. Correct any possible causes of converter damage before replacing the converter. Step Action Yes No 1 Did you perform the Diagnostic System Check-Engine Controls? Go to Step 2 Go to Diagnostic System Check - Engine Controls 2 Are any other DTCs set? Go to the applicable DTC tables Go to Step 3 3 Turn the A/C OFF. Important: If the A/C is left ON the diagnostic may not run. Start the engine and wait until the vehicle is fully warmed up at least ten minutes, then above 1,500 RPM for 5 additional minutes. (One minute for each additional attempt at 1,500 RPM on same key cycle). The vehicle may be driven for the 5 minute run time. Fully open the hood. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Important: If more than 6 tests have been attempted and the DTC has not passed or failed this ignition cycle the test may be aborted. Refer to Diagnostic Aids. Test may need to be completed up to 6 times in order to pass or fail. Does the DTC reset? Go to Step 4 System OK 4 Inspect the 3-way catalytic converter for damage. Inspect for the following: - Dents - Severe discoloration caused by excessive temperatures - Holes - Internal rattle caused by damaged catalyst substrate Verify that the 3-way catalytic converter is a proper original equipment manufacturer part. Did your inspection reveal a condition? Go to Step 9 Go to Step 5 5 Inspect the exhaust system for leaks. Test the exhaust system for restrictions. Refer to Restricted Exhaust in Engine Exhaust. Did you find any of the conditions? Go to Step 7 Go to Step 6 6 Inspect for the following conditions: • Inspect the oxygen sensors for damage. • Inspect the oxygen sensor wiring harness for damage. Did you find any of the conditions? Go to Step 8 Go to Step 9 7 Repair the exhaust system as necessary. Did you complete the repair? Go to Step 10 -- 8 Repair as necessary. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? Go to Step 10 -- 9 Notice: A misfiring condition may damage the replacement three-way catalytic converter. Check for a misfiring condition. If a misfire is present, repair the misfiring condition before replacing the three-way catalytic converter. Replace the three way catalytic converter. Refer to Catalytic Converter Replacement in Engine Exhaust. Did you complete the replacement? Go to Step 10 -- 10 Use a scan tool to clear the DTCs. Turn the A/C OFF. Important: If the A/C is left ON the following diagnostic may not run. Start the engine and wait until the vehicle is fully warmed up-at least ten minutes, then above 1,500 RPM for 5 additional minutes. (One minute for each additional attempt at 1,500 RPM on same key cycle). The vehicle may be driven for the 5 minute run time. Fully open hood. Operate the vehicle within the Conditions for Running the DTC, as specified in the supporting text. Important: If more than 6 tests have been attempted and the DTC has not passed or failed this ignition cycle the test may be aborted. Refer to Diagnostic Aids. Test may need to be completed up to 6 times in order to pass or fail. Does the DTC reset? Go to Step 4 Go to Step 11 11 With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed? Go to Diagnostic Trouble Code (DTC) List System OK -------------------------------------------------------------------------------- Document ID# 671462 2001 Pontiac Grand Prix
 
Top