Question about 2001 Chevrolet Chevrolet Blazer
Replaced both oxygen sensors light is still on
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Posted on Jan 02, 2017
SOURCE: Oxygen sensor replacement
It's something you can with simple tools, you have four O2 sensors. Your going to have to get the truck rescanned or if you have the DTC code, you can find out which O2 sensor has gone bad so you can replace it. Your going to have Two upstream O2 sensors on each exhaust bank, one O2 sensor before the Catalytic Converter, and the last one after the Catalytic Converter. Its like replacing a Spark plug and you can pick up the O2 sensor at any large Auto Parts store with a can of WD 40. Just unclip the wire leads to the O2 sensor and then with a O2 sensor socket or hint close end wrench and hammer, you can remove the O2 sensor from the exhaust pipe. Good luck and be safe.
Posted on Nov 22, 2009
SOURCE: Check engine light came on
My book says ( GM ) P1133 - HO2S/O2S Insufficient Switching Sensor 1 Or Bank 1 Sensor 1
Be that as it may - to clear the codes in your computer - disconnect the battery for a couple of minutes and see if that clears the codes. Let me know. Thanks
Posted on Jan 20, 2011
SOURCE: Have trouble code 45 on
1994 Chevrolet S10 Blazer 4.3L, Vin W
DTC 45 The spark plugs are black on both banks. Right bank plugs are damp. Removed the tuning valve and looked inside the plenum. Can see a washed/clean area on the right side. Fuel pressure is good, it holds when the pump stops.
1. Remove the upper intake plenum cover and inspect for a fuel leak at the fuel pressure regulator.
2. Inspect the fuel pressure regulator and return lines and fittings at the left side of the plenum.
3 Replace the Central Multipoint Fuel Injection (CMFI) unit. Potential Causes: Leaking Fuel Line - One or more may have a problem.
Leaking Fuel Pressure Regulator
Tech Tips: The fuel pressure regulator may only leak at a cold or hot engine, only with vacuum applied, or only without vacuum applied. The leaking at the fuel lines and fittings have as often been the result of repairs as the initial cause of the problem. Handle the lines and fittings carefully. The fuel pressure regulator is a integral part of the Central Multi-port Fuel Injection (CMFI) unit. Any failure requires entire unit replacement.
Posted on Mar 03, 2011
There should be an O2 sensor before and after the catalytic converter on your vehicle, so it will have 2 sensors. You'll need a 7/8" open end wrench or an O2 sensor socket to replace them.
It'll look something like this: http://www.carsteering.com/data/all_images/48-01718.jpg
Posted on May 20, 2011
Before to change other sensor or parts, I suggest scanned the PCM (Powertrain Control Module) to know
exactly what fault code is stored there ans causing engine light turn
on. With this code number we could send other details.
Some Autozone or Autoshop with OBD scanner readers make this job for free.
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Posted on Nov 04, 2011
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