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Showing results for tags 'CEL'.
Found 5 results
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2015 Sierra SLE 5.3L w/ 104k miles. I have been getting nonstop CEL codes for the past few months. After replacing all 4 O2 sensors, purge valve evap, PCV, thermostat and cat, all codes go away after I clear them only to reappear when I drive it next. Took it into a shop and they can find no vacuum leaks. Current codes are P0172 bank 1 too rich, P0175 bank 2 too rich, P0430 catalyst system efficiency below threshold bank 2. Truck drives fine most of the but rpms dip and at times it feels like there is a misfire, plugs were replaced at about 80k. Any help would be greatly appreciated. Thanks.
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I was driving yesterday (35-40 mph) and out of nowhere the CEL came flashing on and the display said something to the effect of (service transmission, service traction control, and forward collision system disabled/unavailable). Having not even logged 5,000mi on the ODO my stomach sank. I continued along driving and dismissed the error messages. I came up to the next red light and the CEL flashed a few more times, then went away. Absolutely zero performance issues before / during / after the warning lights / messages. I have met the forward collision system unavailable message before, but that was due to a small bit of ice on the windshield back in February. Has anyone ever run into this before? I'm in MD and the pollen has accented the onyx black paint into what looks like a bumblebee's rear end. Could excessive pollen blocking a sensor be the culprit? I love the truck (major upgrade from the 2011 Subaru), but it would be a real shame if I'm going to have to make regular trips to the dealer to fix issues like this. (i guess that's American engineering for ya). Appreciate it if anyone can share a similar experience and what ended up happening. -
Just installed s&b cai, and truck stalls out after start, when it doesnt it idles rough and sometimes kicks when starting to drive, it seems alot slower and is throwing me a check engine light please help! What do i do -
Fresh after the 3 year warranty expired I got my first check engine light; it popped up on the first start of the day, not while driving. The scanner showed a historic fault of P0499, which is one of the ever-popular evap system codes. I did a close visual of the vent and purge solenoids, wiring looked OK and there was nothing obviously wrong, so I'll have to do a deeper dive. I did quite a bit of research and I figured out the basic troubleshooting using a 12VDC battery and a multimeter, but I'd like to know which valve is the usual culprit for this code so I know where to start. I only got the P0499 code, not the more common P0449. Also, I tried clearing the code with my scanner, but the CEL never turned off. I've cleared plenty of codes in the past and the light always went off at least for a little while, but not this time. I'll be pulling the negative battery cable for troubleshooting, I'll see what that does. Side note: I tried removing the intake plenum from the throttle body, usually a simple procedure but for some reason the bracket on the passenger side above the alternator wouldn't let go. I had the hose disconnected, but even after some healthy pulling it wouldn't come loose. There's no fastener, it's just a pressure fit. Do I need to use more force? Thanks in advance for any input.
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I did a search here for it but came up empty. Last week, my Check Engine Light came on briefly while on the highway. Just before and after that I noticed a reduced lack of response to giving it more throttle. I had a local guy pull the CEL code and said it came up as #7 Cylinder Misfire. I'm at 55,000 miles and am off warranty. The truck is a '14 with a 5.3. Any suggestions, or thoughts how serious this may be ?
