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Trouble code P0420 means:Catalyst system efficiency below threshold
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Can replacing the flange gasket to exhaust manifold clear a p0420?
Not likely because: Code p0420 refers to a problem with your catalytic converter. The engine computer is able to test that converter by using an oxygen sensor before and after the converter. The computer can only test the converter under very specific driving conditions. If the computer determines that it is a good time to test the catalytic converter it will run the test. It compares the oxygen sensor readings in front of the converter to the readings behind the converter to see if the catalytic converter is functioning properly. If it is not functioning properly it will trigger a p0420. Sometimes if a catalytic converter is on the virge of failing it may fail one test and pass the next. This will cause your check engine light to come off and on every once in a while when the test is performed.
Obd ii code reader provided you the code p1320 amd p0420 for 2000 infiniti i30 how do you know what cylinder has the bad ignition coil?
Pull out eack spark plug individually, the one that's not working will look wet or oilly. It will look wet because the gasoline is not burning completely or at all. That would be the ignition coil to replace.
Diagnostic codes for 2006 PT Cruiser?
* P0016-CRANKSHAFT / CAMSHAFT TIMING MISALIGNMENT * P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW * P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH * P0033-SURGE VALVE SOLENOID CIRCUIT * P0037-O2 SENSOR 1/2 HEATER CIRCUIT LOW * P0038-O2 SENSOR 1/2 HEATER CIRCUIT HIGH * P0068-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION * P0071-AMBIENT AIR TEMPERATURE SENSOR PERFORMANCE * P0072-AMBIENT AIR TEMPERATURE SENSOR CIRCUIT LOW * P0073-AMBIENT AIR TEMPERATURE SENSOR CIRCUIT HIGH * P0107-MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT LOW * P0108-MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT HIGH * P0111-INTAKE AIR TEMPERATURE SENSOR RATIONALITY * P0112-INTAKE AIR TEMPERATURE SENSOR CIRCUIT LOW * P0113-INTAKE AIR TEMPERATURE SENSOR CIRCUIT HIGH * P0116-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT PERFORMANCE * P0117-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT LOW * P0118-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT HIGH * P0122-THROTTLE POSITION SENSOR #1 LOW * P0123-THROTTLE POSITION SENSOR #1 HIGH * P0125-INSUFFICIENT COOLANT TEMP FOR CLOSED-LOOP FUEL CONTROL * P0128-THERMOSTAT RATIONALITY * P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW * P0131-O2 SENSOR 1/1 CIRCUIT LOW * P0132-O2 SENSOR 1/1 CIRCUIT HIGH * P0133-O2 SENSOR 1/1 SLOW RESPONSE * P0135-O2 SENSOR 1/1 HEATER PERFORMANCE * P0137-O2 SENSOR 1/2 CIRCUIT LOW * P0138-O2 SENSOR 1/2 CIRCUIT HIGH * P0139-O2 SENSOR 1/2 SLOW RESPONSE * P0141-O2 SENSOR 1/2 HEATER PERFORMANCE * P0171-FUEL SYSTEM 1/1 LEAN * P0172-FUEL SYSTEM 1/1 RICH * P0201-FUEL INJECTOR 1 CIRCUIT * P0202-FUEL INJECTOR 2 CIRCUIT * P0203-FUEL INJECTOR 3 CIRCUIT * P0204-FUEL INJECTOR 4 CIRCUIT * P0234-OVERBOOST PERFORMANCE * P0243-WASTEGATE SOLENOID CIRCUIT * P0300-MULTIPLE CYLINDER MISFIRE * P0301-CYLINDER 1 MISFIRE * P0302-CYLINDER 2 MISFIRE * P0303-CYLINDER 3 MISFIRE * P0304-CYLINDER 4 MISFIRE * P0315-NO CRANK SENSOR LEARNED * P0325-KNOCK SENSOR 1 CIRCUIT * P0335-CRANKSHAFT POSITION SENSOR CIRCUIT * P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT * P0340-CAMSHAFT POSITION SENSOR CIRCUIT * P0344-CAMSHAFT POSITION SENSOR INTERMITTENT * P0420-CATALYST EFFICIENCY (BANK 1) * P0440-GENERAL EVAP SYSTEM FAILURE * P0441-EVAP PURGE SYSTEM PERFORMANCE * P0443-EVAP PURGE SOLENOID CIRCUIT * P0452-NVLD PRESSURE SWITCH STUCK CLOSED * P0453-NVLD PRESSURE SWITCH STUCK OPEN * P0455-EVAP SYSTEM LARGE LEAK * P0456-EVAP SYSTEM SMALL LEAK * P0457-EVAP SYSTEM - LOOSE FUEL CAP * P0461-FUEL LEVEL SENSOR 1 PERFORMANCE * P0462-FUEL LEVEL SENSOR 1 CIRCUIT LOW * P0463-FUEL LEVEL SENSOR 1 CIRCUIT HIGH * P0480-COOLING FAN 1 CONTROL CIRCUIT * P0481-COOLING FAN 2 CONTROL CIRCUIT * P0498-NVLD CANISTER VENT VALVE SOLENOID CIRCUIT LOW * P0499-NVLD CANISTER VENT VALVE SOLENOID CIRCUIT HIGH * P0501-VEHICLE SPEED SENSOR #1 PERFORMANCE (MANUAL TRANS) * P0501-VEHICLE SPEED SENSOR #1 PERFORMANCE (AUTO TRANS) * P0506-IDLE SPEED LOW PERFORMANCE * P0507-IDLE SPEED HIGH PERFORMANCE * P0508-IDLE AIR CONTROL VALVE SENSE CIRCUIT LOW * P0509-IDLE AIR CONTROL VALVE SENSE CIRCUIT HIGH * P050A-COLD START IDLE AIR CONTROL SYSTEM PERFORMANCE * P050B-COLD START IGNITION TIMING PERFORMANCE * P050D-COLD START ROUGH IDLE * P0513-INVALID SKIM KEY * P0522-OIL PRESSURE SENSOR LOW * P0532-A/C PRESSURE SENSOR CIRCUIT LOW * P0533-A/C PRESSURE SENSOR CIRCUIT HIGH * P0551-POWER STEERING PRESSURE SWITCH PERFORMANCE * P0562-BATTERY VOLTAGE LOW * P0563-BATTERY VOLTAGE HIGH * P0572-BRAKE SWITCH #1 CIRCUIT LOW * P0573-BRAKE SWITCH #1 CIRCUIT HIGH * P0580-SPEED CONTROL SWITCH #1 LOW * P0581-SPEED CONTROL SWITCH #1 HIGH * P0582-SPEED CONTROL VACUUM SOLENOID CIRCUIT * P0586-SPEED CONTROL VENT SOLENOID CIRCUIT * P0594-SPEED CONTROL SERVO POWER CIRCUIT * P0600-SERIAL COMMUNICATION LINK * P0601-INTERNAL MEMORY CHECKSUM INVALID * P0622-GENERATOR FIELD CONTROL CIRCUIT * P0627-FUEL PUMP CONTROL CIRCUIT * P0630-VIN NOT PROGRAMMED IN PCM * P0632-ODOMETER NOT PROGRAMMED IN PCM * P0633-SKIM KEY NOT PROGRAMMED IN PCM * P063A-GENERATOR VOLTAGE SENSE CIRCUIT * P0645-A/C CLUTCH RELAY CIRCUIT * P0685-AUTO SHUTDOWN RELAY CONTROL CIRCUIT * P0688-AUTO SHUTDOWN RELAY SENSE CIRCUIT LOW * P0691-COOLING FAN 1 CONTROL CIRCUIT LOW * P0692-COOLING FAN 1 CONTROL CIRCUIT HIGH * P0693-COOLING FAN 2 CONTROL CIRCUIT LOW * P0694-COOLING FAN 2 CONTROL CIRCUIT HIGH * P0700-TRANSMISSION CONTROL SYSTEM (MIL REQUEST) * P0850-PARK/NEUTRAL SWITCH PERFORMANCE * P1105-TIP SENSOR SOLENOID CIRCUIT * P1106-BARO SOLENOID PERFORMANCE * P1115-GENERAL TEMPERATURE RATIONALITY * P1128-CLOSED LOOP FUELING NOT ACHIEVED - BANK 1 * P1187-THOTTLE INLET PRESSURE/MAP CORRELATION * P1188 TIP SENSOR PERFORMANCE * P1189-TIP SENSOR CIRCUIT LOW * P1190-TIP SENSOR CIRCUIT HIGH * P150D-COLD START ROUGH IDLE - OPEN THROTTLE START * P1593-SPEED CONTROL SWITCH STUCK * P1603-PCM INTERNAL DUAL-PORT RAM COMMUNICATION FAILURE * P1604-PCM INTERNAL DUAL-PORT RAM READ/WRITE INTEGRITY FAILURE * P1607-PCM INTERNAL SHUTDOWN TIMER RATIONALITY * P1696-EEPROM MEMORY WRITE DENIED/INVALID * P1697-EMR (SRI) MILEAGE NOT STORED * P1854-TIP BARO OUT OF RANGE * P1897-PCM PROCESSOR * P2074-MAP/TPS CORRELLATION - HIGH AIRFLOW/VACUUM LEAK DETECTED * P2096-DOWNSTREAM FUEL TRIM SYSTEM 1 LEAN * P2097-DOWNSTREAM FUEL TRIM SYSTEM 1 RICH * P2181-COOLING SYSTEM PERFORMANCE * P2302-IGNITION COIL 1 SECONDARY CIRCUIT-INSUFFICIENT IONIZATION * P2303-IGNITION COIL 2 SECONDARY CIRCUIT-INSUFFICIENT IONIZATION * P2503-CHARGING SYSTEM OUTPUT LOW * P2504-CHARGING SYSTEM OUTPUT HIGH * P2610-PCM INTERNAL SHUTDOWN TIMER FAST RATIONALITY * U0001-CAN C BUS * U0101-LOST COMMUNICATION WITH TCM * U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE * U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE * U0141-LOST COMMUNICATION WITH FRONT CONTROL MODULE * U0155-LOST COMMUNICATION WITH CLUSTER/CCN * U0168-LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE (WCM) * U110C-NO FUEL LEVEL BUS MESSAGE RECEIVED * U110E-LOST AMBIENT TEMPERATURE MESSAGE * U1110-LOST VEHICLE SPEED MESSAGE * U1120-LOST WHEEL DISTANCE MESSAGE * U1403-IMPLAUSIBLE FUEL LEVEL SIGNAL * U1411-IMPLAUSIBLE FUEL VOLUME SIGNAL RECEIVED * U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED * U1417-IMPLAUSIBLE LEFT WHEEL DISTANCE SIGNAL RECEIVED * U1418-IMPLAUSIBLE RIGHT WHEEL DISTANCE SIGNAL RECEIVED
What are the signs of a bad catalytic converter 2005 Chrysler pacifica?
Usual first sign is a check engine light with a code P0420.Usual first sign is a check engine light with a code P0420.
What is check engine error code P0420 on a 2003 vibe?
Trouble code P0420 means:Catalyst system efficiency below threshold
How do you know if a catalytic converter is bad on a Lincoln LS?
You will get a Check engine light with a P0420 error code. Mine just went. Check with the dealer they are warranted for for up to 80k mileage.
Check engine light code P0420 on a 2004 Buick Century?
Trouble code P0420 means:Catalyst system efficiency below threshold (bank 1)
What does check engine code P0420 on Chevy Prizm?
Trouble code P0420 means:Catalyst system efficiency below threshold
What does a P0420 reading on the check engine light mean on a 1996 ford explorer 6 cylinder?
Bank 1 catalytic converter efficiency failure.
How do you know when the catalytic converters are bad?
Depending on what year vehicle you have, with 1996 and newer the check engine light will illuminate and spit out codes like P0420 and P0430.
What does Engine light code P0420 on 2000 Toyota 4 runner mean?
Trouble code P0420 means:Catalyst system efficiency below threshold
2005 Impala with a engine code P0420 hat do you need to replace?
I have a 2005 Impala as well.....I bought a code scanner when my check engine light came on....2 codes came up on the scanner...P0420 and P0420PD.....'catalyst below efficiency'....My car has 115,000 miles on it and it was time for annual safety/emissions inspection so I took it in to a shop.....The catalytic converter had gone bad and had to be replaced.....which was the reason for the P0420 code....
99 Chevy lumina check engine code is p0420 what does it mean?
Low catalytic converter efficiency.
Error code p0420 Ford Contour?
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
2004 Chevy Colorado check engine codes PO420?
P0420=Catalyst System efficiency below threshold
