Question about 2004 Chevrolet TrailBlazer

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2004 chevy trailblazer bogging out

When i am at a red light and i push the gas pedal, my tb revs really hard but wont gain speed the way that it should and it is killing my gas mileage and i had a code for the thermostat. i replaced it and now i have a code for po172 system running rich bank 1?

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  • 324 Answers

Po codes are a default, reset the computer by removing the battery cable for 10 mins.

this will reset the comp back to 0's.

Posted on Nov 26, 2008

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Push down on gas pedal bogging then goes


It could possibly be that there is a wore spot on your throttle position sensor (TPS). It basically is connected to the cable running to the gas pedal and tells the computer how much you're pushing down on the pedal.

If you find that it's bogging down more and more often (like when you need more power climbing hills and never really gets going), it could be that your catalytic converter is clogged, but this will eventually throw some check engine lights.

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2004 chevy trailblazer ext at stop light push gas pedal to go oil pressure get low after 30 feet it goes back to normal


You may have a oil pressure switch going bad or your idle is too low. The idle should be around 600 RPM. The oil pressure displayed on the instrument panel gauge is not an actual reading, it is made up by the computer. You probably should clean the throttle body as well, make sure to clean both front side and rear side thoroughly. Also disconnect the battery while doing the cleaning. This will allow the computer to reset and relearn.

Aug 30, 2011 | 2004 Chevrolet TrailBlazer

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Looking for OBD codes chevy trailblazer 2004. codes p0128,p1680


The P0128 is your thermostat. Your engine isn't getting up to temperature, is probably stuck open.

P1680 has to do with your pedal position sensor. Either way, your PCM either needs to be recalibrated by the dealer OR replaced. This depends on where your VIN # falls on the list of the technical service bulletin that is out there.

Mar 08, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

2004 chevy trailblazer, 65,000 miles....check ingine light on... when I press the gas pedal it bogs down... also, yesterday the car stayed idel at 40 mph without my foot on the gas pedal


Could be many things. I know this is not much of an answer but you need to have scan done to get the "Trouble code" which will most likly give you your answer or at least point you in the right durection. I hope this helped and good luck. Oh and by the way alot of auto parts storres will run the scan for you for free.

Jan 28, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Why when i push the gas on my 2004 trailblazer it wont speed up


Your SUV has an electronic throttle body. Unlike the other type which is driven by cable, this relies on multiple sensors in the gas pedal and multiple sensors in the throttle body. If one or more of the sensors don't agree (i.e: one sensor says you're at 80% it while another says 40% throttle) then it goes in to a default mode or "limp home" mode. It basically makes you take it to be repaired because it is unsafe to be driven.

Dec 12, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

I have a 05 chevy trailblazer the head lights wont come on i have running lights an highbeam just wont come on on lowbeam


Replace relay #46 in the fuse box. This is the relay for low beams. Or you could try cleaning the contacts first, which is what I did to fix this problem. I keep a new one in the glove box in case it ever really does go out. Very common problem for our TB's.

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Would an idle control valve cause a car not to accelerate?


no, idle air control valve is literally to control your idle speed.
what happen when you press on gas? car shakes, RPM goes up, or engine just bogs down?

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2004 trailblazer wont allow me to shift into gear!


are you pushing in the brake pedal,if so then either the switch on the brake pedal is out or the shift lock is out,need a test light to check it

Jan 31, 2010 | 2004 Chevrolet TrailBlazer

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