Question about 2003 Chevrolet Avalanche

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Need to replace mu oxygen sensor on my 03 avalanche. where do I start?

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Depends on which one you need to replace. they are all located on the exhaust pipe before and after the catlytic converter.

Posted on Sep 30, 2009

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Depending which engine you have, there are either 2 or 4 oxygen sensors, you need to know which one is bad, anyone that can scan the PCM should be able to tell you which one needs to be repalced. If there are only 2 replace them both, the others will not last much longer any way.

Posted on Sep 30, 2009

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4 Answers

What does code p0155 mean


P0155 = 2/1 O2 Sensor Heater Failure, Oxygen sensor heater element malfunction. logic dictates that you replace your O2 Sensor. DIY car obd2 code scanner online shopping

Jun 05, 2014 | 2004 Chevrolet Avalanche

1 Answer

Oxygen sensor need to replace bank 1


Thanks for choosing Fixya. Your bank 1 sensor is the very first sensor toward the front. Your bank 2 sensor is further in the back. So the one your looking for is the closest sensor to the engine.

Mar 14, 2012 | Cars & Trucks

1 Answer

2004 Avalanche, check engine light comes on and off, replaced oxygen sensor. Is it the MAF sensor? Secondly does not start on first try usually 2nd or 3rd, acts like the fuel is bleeding off. Once it...


The purpose of the check lights, is to
let you know you have possible vehicle
system problems

You check for codes,within a couple of days
Then use the codes to diagnose the system
with an issue and repair if necessary.

You can't ask what it might be or guess

You have to test down to the component level
and only replace a part when you understand
how they work and a test shows they failed

Codes have nothing to do with replacing parts

Apr 23, 2011 | 2004 Chevrolet Avalanche

1 Answer

Went to autozone got code p0420 what do i check 2002 chevy avalanche


That's an oxygen sensor/converter issue. When the (2) O2 sensors read exactly the same readings (one either side of converter) means converter is bad.

Mar 06, 2011 | 2002 Chevrolet Avalanche

2 Answers

P0154 code and p01153


both codes point to the oxygen sensor on bank 2 sensor 1 ..
that would explain the rough running also .. the engine will default to a rich condition ...

p0154 indicates no activity on bank 2 sensor 1 oxygen sensor
p01153 is showing "low switching" for bank 2 sensor 1 oxygen sensor ...

there may be a wiring pigtail coming from the sensor. that plugs into another connector a few inches away .. check that connector for damage or corrosion .. if its ok then you likely need a new oxygen sensor ..

its not a good idea to continue driving with this condition since it will eventually damage the catilytic converter. that is probably getting very hot now with the extra load of fuel ..

Jul 05, 2010 | 2002 Chevrolet Avalanche

1 Answer

Where is the front oxygen sensor located on a 2003 chevy avalanche 1500 5.3l


There are 4 oxy. sensors listed for your truck. they're located as follows
Left exaust before catalytic converter. bank1 sensor1-after cat conv.
bank1 sensor2. right exaust before cat.conv. bank2 sensor1-after cat.
conv. bank2 sensor2. Hope this helps.

Mar 31, 2010 | 2003 Chevrolet Avalanche

1 Answer

Oxygen sensor


you need to borrow the oxygen sensor wrench from autozone or whereever you bought the sensor. Section 03-14: Engine Controls, Electronic 1996 Taurus, Sable Workshop Manual REMOVAL AND INSTALLATION -------------------------------------------------------------------------------- Heated Oxygen Sensor (HO2S) SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Oxygen Sensor Wrench T94P-9472-A Removal and Installation Disconnect battery ground cable (14301). Refer to Section 14-01 . On 3.0L (4V) engine remove cowl extension and right side of leaf screen. Disconnect engine control sensor wiring (12A581) from heated oxygen sensors (HO2S) (9F472). Do not remove harness connectors from the brackets. Raise vehicle on hoist. Refer to Section 00-02 . NOTE: If excessive force is needed to remove a heated oxygen sensor, lubricate the heated oxygen sensor with penetrating oil prior to removal. Remove heated oxygen sensors from exhaust manifolds (9430) using Oxygen Sensor Wrench T94P-9472-A. To install, reverse Removal procedure. Apply a coating of anti-sieze compound to threads of heated oxygen sensor. Tighten heated oxygen sensors to 34-46 Nm (26-34 lb-ft).

Jun 13, 2009 | 1996 Ford Taurus

1 Answer

Need to know which side of vehicle is bank 2


The sensor bank 2 sensor 2 is on the right side after the catalytic converter

Jan 07, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Miss on cold start up


Have you checked the oxygen sensor? If the engine is running lean, then it would behave the same as you described. Those sensors should be replaced every 80K or so.

Sep 05, 2008 | 2002 Chevrolet Avalanche

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