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Need to replace o2 sensors on 1999 tahoe - 1999 Chevrolet Tahoe

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Just unplug it, then unscrew it, pretty simple.good luck. note you have 3 or 4 o2 sensors make sure you replace right one.

Posted on Oct 05, 2009

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Posted on Jan 02, 2017

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2007 tahoe o2 sensor, installed new o2 sensor but engine light stays on. code says bad


which sensor was replaced
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How to install 02 sensor for a 1999 chevy tahoe


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Error code p1133 indicates faulty O2 sensor on Bank-1 sensor-1. The problem may rise due to faulty or damaged sensor wiring. Also defective O2 sensor may be cause of problem. First thing you should do is to inspect the wiring and connectors then go for replacing the O2 sensor if wires don't work.

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I have a 03 tahoe 5.3cats were getting red ,replaced them engine light on ,codes show system lean bank 1&2 also crankshaft sensor a circiut range / performance


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1 Answer

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Your O2 sensor has been running for a long long time. OBD 2 checks both O2 sensors *(pre and post catalyst) to confirm it is just a bad sensor and not an out of range sensor condition or catalyst problem.

If your exhaust system was plugged you would hear it as a loud hissing noise of exhaust escaping any way it could before the plug. You would also notice nothing coming out of the back of the exhaust system. Both easy to rule out.

Replace the appropiate O2 sensor, reset your computer, and drive!

Good luck and be careful!

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1 Answer

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Check your exhaust. If the vacum is not complete, the truck may idle like ****. Same for your catalytic converters and O2 sensors. do a system check at a garage.

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1 Answer

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Heat sensor or heated O2 sensor? These are 2 different things. After replacing the sensor the first time, did you remove the negative battery cable for at least 30 seconds? This will re-set the ECM.

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