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Why might an '89 Honda Civic fail an emissions test 3 times because of high readings on idling after changing the O2 sensor and catalytic converter?
Wiki User
∙ 19y ago
Depends on which of the readings failed. Was it CO (carbon monoxide), HC (hydrocarbons), NOx (nitrous of oxides), or a combination of them?
Wiki User
∙ 19y ago
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Will the GReddy Ti-C Catback Exhaust System for 06-09 Honda Civic affect my emissions reading?
The GReddy Ti-C Catback Exhaust System will have absolutely no effect on emissions readings because it retains the stock catalytic converter.
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.
Is the 02 sensor connected to the vent solenoid?
O2 (oxygen) sensors come in pairs. One is placed before the catalytic converter to get an exhaust reading for unused fuel vapors. The other is placed after the converter to measure the same. The on board computer compares the two readings to make sure the converter is working (heating up to burn unused gas vapors for cleaner emissions).
What happens when you remove the catalytic converter from a 2005 silverado?
Check engine light will come on due to bad readings from oxygen sensor after cat
What is the working principle of oxygen analyzer?
Sensor 1 (before the catalytic converter) adjusts the fueling based on sensing if the engine is burning fuel rich or lean. The post-converter sensor detects if the converter is operating properly by looking for a difference in readings
Can you eliminate the catalytic converter on a 2004 impala?
NO. It is illegal, can cause low power and poor fuel economy as the computer tries to adjust for the improper readings from the O2 sensors.
Can your car run better without a catalytic converter?
absolutely it will have more power however it wont pass the smog If it is a 1996 or later model the computer will try to adjust for the incorrect oxygen sensor readings ,due to the missing cat. This can and will hurt power and economy. Plus it is very illegal to remove a catalytic converter.
Will removing catalytic converter have negative effects on an engine?
As far as the environment is concerned, yes. Catalytic converters are very important in regulating the amount of pollution your vehicle emits. As far as vehicle performance, removing a catalytic converter could increase horsepower and exhaust flow. Removing the converter can (and does on most) cause the computer to over-correct for the improper oxygen sensor readings. This over-correction usually causes a reduction in power, economy, and running performance. It is also highly illegal.
Can you remove the catalytic converter if the sensors is before and after the cat?
No. It is not legal. The check engine light will turn on. The computer will try to correct for improper sensor readings and that will cause fuel economy and performance issues.
What are exhaust gases maximum allowable readings for a fuel injected vehicle equipped with a catalytic converter?
the five exhaust gases are carbon monoxide, carbon dioxide, oxygen, nitrogen oxides and unburned hydrocarbon
What is DTC PO420 on a 2000 Camaro?
P0420 usually points to a failed catalytic converter, if the exhaust system is intact, that is. Exhaust leaks in front of a catalytic converter can affect the O2 readings and at times throw a false code. P0141 indicates only the heater circuit of the o2 sensor has a problem. Usually it's the element in the sensor, and replacing the sensor would fix that, but it doesn't rule out a harness issue or a short in the wiring
Is there a connection between Cat failure and code P1456 you replaced your exhaust after the reading stated a replacement of Catalytic converter After several Months the engine light came back onP1456?
You will have to figure this out for your self but how to think about this. There are two Oxegen Sensors in the exhaust. One on each side of the Catalyic converter. The difrence in readings is how the system checks the Cat. If you took out the Catalist and replaced with a straight pipe you get trhis code. There is a simple way around it by installing a resistor in the wiring to the rear cat. But that is not going to pass emissions testing.
