You really shouldn't have to reflash it. Reflashing is a process that basically erases everything on the computer, and then reprograms it. In order to reset the "Service Engine" light, you should be able to disconnect the negative side of the battery for 15-20 minutes and then reconnect it.
== == 1996 Corolla's have two oxygen sensors. The first sensor, is pre catalytic converter. It is located on the exhaust manifold. The second sensor is post catalytic converter.
I was quoted at the dealership for $1000 not including labor.
there should be two before th catalytic converter and after
Check the heat shield on the catalytic converter
As far as I know it has 1 cat after the headers and there is also a resonator.
Under the vehicle bolted to the exhaust pipe.
A 2003 Toyota Corolla typically has one catalytic converter. This single unit is designed to reduce harmful emissions from the engine's exhaust system. However, some variations or specific models may have additional components, but the standard setup includes just one catalytic converter.
On a 1999 Toyota Corolla, the oxygen sensor is typically located in the exhaust system. There are usually two sensors: one upstream (pre-catalytic converter) and one downstream (post-catalytic converter). The upstream sensor is found on the exhaust manifold or near the front of the catalytic converter, while the downstream sensor is located further along the exhaust pipe after the catalytic converter. You may need to lift the vehicle or access it from underneath for better visibility.
take the bolts off. drop the old install the new one.
its long gone now, lets put it that way.
On a 2000 Toyota Corolla, the oxygen sensor is typically located in the exhaust system. There are usually two sensors: the upstream (pre-catalytic converter) sensor is located on the exhaust manifold, while the downstream (post-catalytic converter) sensor is found further down the exhaust pipe, near the catalytic converter. Accessing these sensors may require lifting the vehicle for better visibility and reach.
I have the same fault code on my 2003 Corolla. From my research, the code means that the car's computer is sensing that there has been a drop in catalytic converter efficiency. This is determined by the computer by comparing the signal of the O2 sensor mounted before the catalytic converter with the signal of the O2 sensor mounted after the catalytic converter. If the two signals are too similar, this means that the catalytic converter is not doing it's job. A number of things can be the cause of the fault code: # Bad catalytic converter - It's reached the end of its useful life. It's time to replace it. # Engine leaks oil and/or coolant into exhaust- Oil and/or coolant is leaking and is clogging the catalytic converter. Engine seals and gaskets should be checked. Engine compression should also be tested. Any leaks should be repaired and the catalytic converter should be replaced. # O2 sensor/s bad - Although O2 sensor failure usually gives it's own fault code, not everything is perfect. Sensor's should be checked anyway just in case the computer did not catch the fault. In this case sensor/s need replacing. I hope this information comes in handy. Unfortunately, what ever your specific situation is, it is most likely a costly one.