The oxygen sensor on your Chevy Astro monitors the O2 to burned fuel ratio and communicates that blend to the personal computer. When it picks up an unacceptable variance thanks to combine, it triggers the malfunction indicator shine (MIL) and illuminates the "Function Engine Soon" glossy. There are two O2 sensors on your Astro Car, and you Testament itch to fix upon which one (or whether it's both) needs to be replaced. An Car parts store where you'd get the replacement sensors could plug in a law reader and cinch this data for you.
Instructions
Repeat this step for the other sensor if necessary.9. Remove tools and old sensors from under the Astro. Remove the wheel chock close the hood, release the parking brake and back off of the car ramps.
Manipulate the parking brake and Proceeds the hood lock. Levy a spin chock at the end one of the rear tires and direct the hood To admit a diminutive brilliant down buttoned up the engine compartment.
2. Assign on the safety glasses and crawl under the Astro with all the tools and a creeper whether you accept one.
3. Establish the O2 sensor(s) that duty to be replaced. The front sensor or "sensor one" is located up on the Chauffeur's side of the front exhaust Y-pipe. The rear sensor or "sensor two" is located near the catalytic converter on the passenger side of the undercarriage.
4. Hint the wire that is attached to the sensor until you establish the plug, about 7 to 8 inches away. Disconnect the plug by pressing in the clip lock, using a flathead screwdriver and pulling the plug assembly apart. Place the wire of the sensor through the slot of the oxygen sensor socket and snap the ratchet into place on the back of the socket. Try to loosen the sensor. If it does not move under force, you may have to heat up the exhaust pipe area surrounding the sensor. Do not heat the sensor, too. You want to expand the metal of the pipe and not the metal of the sensor extremely. Remove the sensor.
5. Allow the exhaust pipe ample time to cool down before continuing if you had to use the torch. If not, apply a light coat of anti-seize lubricant to the threads of the new oxygen sensor. Some quality after-market replacement sensors may come equipped with some lubricant already on them. Be careful not to receive the lubricant on the sensor itself.
6. Screw the sensor into the threads of the porthole and tighten with the socket and wrench. Do not overtighten and risk stripping the threads of the new sensor.
7. Reconnect the plugs of the sensor to the wire harness.
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