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Why does the check engine light stays on after replacing the egr o2 sensor mass air flow and catalytic converters?
Wiki User
∙ 18y ago
The fault must be cleared using a tester. This is a general answer, as in for many cars...yours may require a manual reset: After correcting the problem, say replacing the Mass sensor, the light will reset but only after the car has the opportunity to run through all it's checks and the computer agrees. This can take a few miles or even several hundred, and sometimes requires a few turn on and offs. Alternatively, if you made a good guess, even checked the code, but didn't fix all the things causing the CEL to go on, it isn't going to go off!
Wiki User
∙ 18y ago
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Is bank1 sensor 1 and 2 are they both upstream?
No Bank 1 is the passenger side of the engine in your Ford Expedition , Bank 2 is the drivers side Sensor 1 for both sides of the engine are before the catalytic converters ( upstream ) Sensor 2 for both sides of the engine are after the catalytic converters ( downstream )
What does bank 2 sensor 2 oxygen sensor do?
It is the downstream sensor on one side of the engine that tells the computer how well the catalytic converters are working.
What would cause the catalytic converters to get cherry red on a 97 f150 with a 4.6 engine?
Mass airflow sensor and or aircharge sensor is bad
How can you tell What is bad the catalytic converter or is it a sensor?
replace sensor,catalytic converters smell like rotten eggs when going bad
What is an o2 sensor in an 1998 xtl 4x4 for explorer do?
The O2 sensors ( 2 of them ) nearest the engine are used to sense the amount of oxygen in the exhaust gasses and send a signal to the PCM that adjusts the air / fuel mixture for the engine . The O2 sensors ( 2 of them ) after the catalytic converters are called catalyst monitors and monitor how well the catalytic converters are performing
Where is 02 sensor on 1996 ford explore upstream?
They should be in the exhaust system close to the engine ( either in the exhaust manifold outlets or the exhaust pipe ) before the exhaust enters the catalytic converters Bank 1 is the passenger side of the engine and sensor 1 is the upstream sensor Bank 2 is the driver side of the engine and sensor 1 is the upstream sensor on that side
Where is bank 2 sensor 2 on a 2003 Chevy Suburban?
Assuming this vehicle has duel exhaust with duel catalytic converters, bank 2 sensor 2 would be the O2 sensor after the passenger side catalytic converter.
How do you make 02sensors worke with no converters?
They will still work with no converters. The O2 sensor downstream from the catalytic converter is there to monitor the function of the converter its self. So if you remove the converter, the second sensor will trigger the "check engine" light. The sensors (and the entire engine its self) is not effected, however. The light is basically just telling you the converter is no longer working, which is no surprise if it has been removed.
Where is the oxygen sensor on a 2009 Dodge Journey?
There are four oxygen sensors. One on each side of the catalytic converters.
What does an oxygen sensor do in a 1996 ford explorer?
The oxygen sensors located before ( upstream ) of the catalytic converters are used to " sense " the amount of oxygen in the exhaust to adjust the air / fuel ratio for the engine
How do 02 sensors affect catalytic converters?
The Oxygen (O2) sensors located in the catalytic converters help to keep the vehicle running cleaner. If an oxygen sensor goes bad, the vehicle might start to misfire occasionally. The catalytic converter can become plugged up if the oxygen sensor is not working properly. This could lead to the vehicle not running at all.
Where is bank 2 sensor 1 on a 4 cylinder engine?
Subaru Easy to figure out What cylinder is #1 ? It is in bank # 1 So the Bank two #1 oxygen sensor is in the exhaust pipe on the other side of the engine before the Catalytic converters or where the two pipes join together.
