Most modern Toyotas use a M8x1.0 nut for the O2 sensor flange bolts.
On the 98 u have two oxygen sensors an upstream and a downstream. The upstream oxygen sensor is located closer to the front of the truck by the transmission. The downstream oxygen sensor is located on down torwards the back of the truck along the side of the frame.
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter
Bank #1 is the passenger side of the engine , and sensor # 2 is in the exhaust after the catalytic converter ( downstream )
On most ford escorts, the oxygen sensor is located under the hood, on the exhaust manifold or the exhaust pipe. You'll have to look down between the engine and radiator.
P0141 - downstream heated O2 sensor heater circuit fault ( Bank 1 ) according to my Haynes repair manual ----------------------------------------------------------------------------------------- P.S. bank 1 is the passenger side of the engine , the downstream oxygen sensor is after the catalytic converter ( or sensor 2 )
I believe there are 2 oxygen sensors that are used for air / fuel ratio and 2 oxygen sensors that are downstream from the catalytic converters and are called catalyst monitors
Where are the Bank 1 Sensor 1 oxygen sensor on a 1998 ford explorer?
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter
Upstream is just after the exhaust manifold, and downstream is after the catalytic converter