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I had the same problem with my 92 Prizm. NO ppm was 4350. I replaced the EGR Modulator and it solved the problem.
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Which emissions control system is designed to reduce NOX emissions?
egr valve
What is the purpose of a catalytic converter?
To lower the amount of harmful emissions in the exhaust. It converts HC, CO and NOx into H20, CO2, and N2.
Your 95 prizm failed the emissions the nox reads too high what do you need to replace you cannot find a egr valve on this car it is a 1.6 liter with a 5 speed?
have it scanned and have them ck your oxygen sensor
Where is the nox sensor?
A NOX sensor is a nitrogen oxide sensor. It is used in a car's exhaust system to check emissions for nitrogen oxide.
What could cause the nox to be to high on a 1999 dodge durango?
Bad EGR, Exhaust Gas Recirculation valve. That is what reduces NoX emissions
How does an EGR valve work?
an egr valve opens to put inert gases in the combustion chamber to lower the temperature. this is done to reduce NOx emissions that are produced at high temperatures.
Why does your 1989 Jeep Cherokee fail the nox part on emissions?
If there are no other problems and the vehicle is failing the NOX emissions test, it's probably running too lean. Check the EGR valve, fuel pressure and the Oxygen sensor.
What is def fluid for?
DEF (diesel exhaust fluid) is used as a consumable in SCR (selective catalytic reduction) in order to lower NOx concentration in the diesel exhaust emissions from diesel engines.
What is the purpose of an EGR valve for a 1993 Ford Probe?
EGR stands for Exhaust Gas Recirculation. It is an emissions control that recylces exhaust gas through the engine to clean out any left over fuel, and to cool the combustion chambers to help lower Nox emissions. Nox is best known as "smog". It is illegal to disable or modify any emissions control on your car. EGR problems generally cause rough idle and sometimes, hard starting.
Which source is responsible for the greatest amount of NOx emissions in the US?
Too obvious, fossil fuel combustion.
Is it harmful to the engine if you removed the EGR?
Egr valve is for emissions it reduces nox so will not be harmful to engine
If your 1995 Geo Prism has failed emissions tests twice should you replace the oxygen sensor or catalytic converter?
Depends on what failed on the emission test. HC? CO? NOx? Combination of these? Check to make sure all the vacuum lines are okay. No cracks or anything.
