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Check engine light is on and the code is p1133 is this the o2 sensor and how much will his cost me? please help

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2 Answers

Cost for what?

You need to have the vehicle properly
diagnosed using the P1133 & whatever
other codes you may have.

Just because you have a code,doesn't mean a part
replacement is needed.

An O2 Sennsor, you can look up on a web site
like NAPA & replace yourself in 10 minutes,if you
know how to test it.

Posted on May 23, 2011

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Lmost O2 sensors are less than $75, that code indicates a 'lazy' sensor that is not switching fast enough to satisfy the engine computer-means your engine is probably near 100,000 miles or is in need of routine service (plugs, throttle body cleaning, etc.)-it will run smoother and get better gas mileage if you replace this sensor (bank one, side one, the sensor on the same bank as the #1 cylinder, in front of the catalytic converter).

Posted on May 23, 2011

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SOURCE: 2004 GMC Envoy check engine light remains

Leave 02 sensor alone ,it is doing it's job . It is heated up because of lean fuel mixture due to incorrect engine temp.,replace thermostat before looking further.

Posted on Jan 20, 2010

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P1133/oxegen sensor


MAKE SURE THE CONNECTIONS AT THE SENSOR ARE GOOD,ALSO CHECK FOR VACUUM LEAKS,HERE'S A LINK TO YOUR CODE,THE OLD SENSOR MAY BE GOOD,JUST A VACUUM LEAK, P1133 Chevrolet HO2S Insufficient Switching Bank 1 Sensor 1

Oct 17, 2015 | 2002 Isuzu Rodeo Sport S 3.2L V6 Hard Top

1 Answer

My 1997 Toyota Camry Check engine light just came on and i put it on the code reader an code P1133 came up can you tell me what thid mean thanks .


P1133 refers to the air/fuel ratio sensor bank 1 sensor1 (This is the first O2 sensor in the exhaust). the code indicates that the circuit is either open, shorted, or has a poor connection. Most of the time this can be fixed simply by removing, cleaning, and reinstalling the sensor (checking the connections in the process). if after reinstalling (and having the code cleared from memory) the light comes back on you should replace the sensor.

Feb 07, 2014 | 1997 Toyota Camry

1 Answer

Check engine light on 2005 chevy colorado code p1133


This code is for insufficient switching of the oxygen sensor. Make sure you don't have any other codes, misfires, vacuum leaks and/or exhaust leaks as these will affect O2 readings. Here is some more info I found on the web. http://m.engine-light-help.com/?url=http%3A%2F%2Fwww.engine-light-help.com%2Fgm-trouble-codes.html#3331

Jun 24, 2012 | Chevrolet Colorado Cars & Trucks

1 Answer

Check engine light came on with code P1133. front oxygen sensor. Replaced sensor, light is still on. Does it have to be reset?


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

Jan 20, 2011 | Chevrolet Colorado Cars & Trucks

2 Answers

Hi, I have a 1999 Saturn SC2 and my service engine light came on. I did a diagnostic on it and the code showed P1133. The guy at the auto shop told me it's an oxygen sensor, but didn't know if it was the...


First, I wouldn't let that guy work on your car. P1133 is "O2 Sensor Slow Response - Sensor 1" Anybody that has been in the auto repair business for more than a week should know that Sensor 1 is ALLWAYS the FRONT sensor.

Note: O2 sensor codes do not necessarily mean that an O2 sensor needs to be replaced. Most O2 Sensor codes are caused by something other than the O2 Sensor itself. (there are several different possible O2 Sensor codes for your car. P0131, P0132, P0133, P0134, P0138, P0171, P0172, P1133, P1134)

The most likely cause of DTC (Diagnostic TroubleCode) P1133 is contamination of the O2 Sensor. Replacing a contaminated O2 Sensor without repairing the source of the contamination will only result in a repeat repair. It could be caused by bad fuel, improper use of RTV sealant, engine oil or engine coolant. I have seen this caused many times by engine oil leaks that run down the exhaust and clog the holes in the side of the sensor shield. (The sensor must "breathe" to work properly)

Then on the other hand, if your vehicle has a lot of miles on it, the sensor could be just chemically worn out. In any case, the FRONT sensor is the one that is setting the code.

Jan 05, 2011 | 1999 Saturn SC

1 Answer

2004 GMC Envoy check engine light remains illuminated. Diagnostics revealed codes: P1133 and P0128. P1133 points to a heated oxygen sensor and P0128 indicates a possible defective thermostat. The O2 sensor...


Leave 02 sensor alone ,it is doing it's job . It is heated up because of lean fuel mixture due to incorrect engine temp.,replace thermostat before looking further.

Jan 20, 2010 | 2004 GMC Envoy

2 Answers

Check Engine Light


P1133 HO2S Insufficient Switching - Read Our Article On Oxygen Sensor Codes For Help With This Pontiac Trouble Code (check your oxygen sensor also called O2 sensor)

All the codes you have listed come back and refer to the oxygen sensor. I would say that it is your problem. you vehicle may have 2

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Thank you and happy holidays

Dec 09, 2009 | 2002 Pontiac Firebird

1 Answer

1998 pontiac grand prix gt service engine soon light just came on. Auto Zone did a test and came back with a code. It said ''Fuel Air Metering P1133''. Can you tell me what this is?


P1133 HO2S Insufficient Switching Sensor 1

THIS IS THE O2 SENSOR CLOSEST TO THE ENGINE AND BEFORE THE CONVERTER.

AN EXHAUST LEAK OR A BAD SENSOR COULD BE THE PROBLEM.

CHECK THE O2 SENSOR WIRING FOR DAMAGE, CORROSION, ETC.

Jul 10, 2009 | 1998 Pontiac Grand Prix

1 Answer

Codes p1153 -p1140 -p1133-p0174


P0174 Basically this means that an O2 sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.
P0140 Basically this means the an O2 sensor in Bank 1 detected a lean condition, same as mentioned above. Bank 1 is the side where cylinder #1 is.
In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling.

P1133 and P1153 indicate that the HO25 Sensor has gone bad. There the O2 sensor to the left and right bank at the exhaust manifold. When the engine first start's the PCM runs on a open loop and ignores the O2 readings till it reaches it's operating temperature. Once the operating temperature has been reached the diagnostic will only run once per ignition cycle and if the PCM detects a lesser then specified value, a DTC of P1133 or P1153 will come up.
Once the problem has been repaired, after 3 start cycle will reset the MIL light. If the O2 is just dirty and slow to heat up try cycling the ignition start 3 times and the light should go off if the O2 sensor does not fail.
Try cleaning the MAF first and see if the light comes off after a few ignition cycle, If the service light is still on you can always have Auto Zone clear the DTC codes and see if it comes back which then check the left and right bank wire harness to the O2 sensors. 
Good luck and hope this helps, keep me posted.

May 25, 2009 | 1997 Oldsmobile Aurora

1 Answer

Code: P1133


P1133 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor
You will need to check the output signal from this O2 sensor, if the voltage low (.10-.25 volts) try spraying propane into the air cleaner to see if the O2 volts go up, it should go to around .75 volts, if nothing happens then the O2 sensor is bad, bank #1 O2 is on the same side as #1 cylinder
PLEASE RATE THIS INFO.

Nov 25, 2008 | 2005 Chevrolet Silverado

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