2005 aveo, check engine light And "Hold" light flashing...

Hey,
i have a 2005 aveo that is giving me issues. the check engine light is flashing (p0300, random misfire. i checked/cleaned/regaped the plugs) check the wires and connections, everything looks good, no vacuum leaks that i see, egr seems ok), and i also at the same time have the "Hold" light flashing, and when it does so...the tranny will not shift into 4th gear, it just stays in 3rd. however when the hold light doesn't flash the tranny shifts smooth and fine into 4th.

this is my first aveo....any idea's?

What do you mean by "looks good"? Do you mean you visually inspected them, tested them, or replaced them? I've had plugs and wires that visually looked good but later proved to be malfunctioning and had to replaced.

i was referencing visually (as it was still light out), that evening i gave the wires a shower...it was a mini lightening show. could wires cause both the p0300 AND the HOLD light to flash though? i know yes to the p0300 but i don't see how the hold light (thus transmission) would be effected by an ignition issue?

yes, misfire of the coilpack can cut the rpm signal to the transmission ecu.

do the coilpack and wires.

have other people experienced this issue? i can't afford to throw parts at it and find out that wasn't the issue.

i have directed a few people to that as the problem.

to under simplify the issue, put start the car and mist the coil pack with water, if you see sparks, its arcing out.

had you Read my reply....you'd have seen i've already done that. i also replaced the wires, with no resolution to the issue.

i read your reply, you misted the wires, do you mist the coil pack?

did you read my reply where is said the coil pack misfire will cut the rpm signal to the transmission?

yes misting the wires includes misting the coil pack. there was no evidence of any arcing of the coil pack...the plug wires showed some arcing. i'm going to change the plugs, and run some seafoam through it today.

what are you hoping the seafoam does?

hoping it loosens up the potential carbon/sticky valves....as per the TSB. however in the end the plugs/wires/new hose from the manifold to the map sensor, and dose of seafoam yielded no results...still doing the same thing. and i cannot afford to spend the 120$ on a coil when theres potential that it is not the issue.

Well ive said it on this sight a dozen times, dont waste your time with seafoam..

instead of spending the $120, pull the coil pack off the car, inspect it thoroughly for cracks, discoloration, etc, check the plugs, and everything. If it has any signs of wear, you have two options. 1. replace it, and my experience, unfortunately, suggests not getting the cheap one. 2. seal it. I have done this many times with success on externally failing coil packs. I typically sal all te cracks with a high temp silicone, and then "dip" the entire unit with old plug wires and tape over the wiring connections as a mask, into a silicone tool coating. Look up "vr6 coil pack repair" you might find a how to somewhere. this will cost you less than $15, and might cure your issue.

will look into that. thanks

I will have to check this out too. I was having a similar issue with my aveo. I would come out of work and let off the gas to come up to the light and by good luck it would turn green (or there was no traffic so I just went) and after I made the right turn I would get back onto the gas and it would just not go. As soon as I would let off the gas it would be ok and I could get right back on it. The hold and check engine light would flash...then just randomly stop.

If you are still having this problem check the plug at the air filter intake tube. I recently had to replace the cylinder head and didn't plug that in because the tube was dry rotted and I was going to replace it. I didn't think it would have anything to do with the transmission but it does. Does anyone know why?

please confirm if you find any solution fot this fault "HOLD" brinking

I do everything and I frustated

I change the plug spark

I checked the IAT sensor (connection only)

I changed the ATF Oil

the harness looks godd

please help me

i maybe way off here but i read that if the hold light is on or blinking it means that there is an issue with the transmission werner001

have you any single-line o wiring drawing AVEO 2005 1.6? i need follow and test every sensor...tanks...

Sorry, I didn't use a diagram. Like I said, it was basically a process of elimination. I just plugged in the last thing I knew wasn't plugged in yet and the light went off.

I have a 2009 aveo that is doing the same thing what was your fix

Bender, take it to the dealer if you are having issues (and if it is still under warrenty as well). The 2nd gen aveo is different than the first, did you check the coil pack already? Also, if you diconnect the battery for 10 minutes or so, it will "reset" the car and the lights will go off, give that a try as well.

read the code for the light. o2 sensor on an 09 is possible, it will affect fueling, but not sure about the hold light, i can make educated guesses though.

the plug at the air cleaner intake was my problem the light was flashing and the car wouldn't shift out of third gear

Air cleaner? Do you mean air filter? I am always interested in learning. How did you determine that was the problem?

yes the air filter. I had to replace the cylinder head and that was the one plug i didnt plug in because i was going to replace the tube that connects it to the fuel injection which has the sensor in it. when i plugged it in the light went off. maybe yours is shorted.

QUOTE=azaveo;157426]Hey,
i have a 2005 aveo that is giving me issues. the check engine light is flashing (p0300, random misfire. i checked/cleaned/regaped the plugs) check the wires and connections, everything looks good, no vacuum leaks that i see, egr seems ok), and i also at the same time have the "Hold" light flashing, and when it does so...the tranny will not shift into 4th gear, it just stays in 3rd. however when the hold light doesn't flash the tranny shifts smooth and fine into 4th.

this is my first aveo....any idea's?[/QUOTE]


Hi I wonder if you got that issues fixed if so I would be greateful to know how

please let me know if you were able to fix that problem if so I would be greatful to know how.

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Originally Posted by ak1you

please let me know if you were able to fix that problem if so I would be greatful to know how.

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The OP never posted the outcome of his problem, and is unlikely to respond to your question. Happens way too often - problem gets fixed, but they can't be bothered to take a couple more minutes to report the result and help out someone else :sad3:
So you should either start a new thread or continue this one, describing your vehicle, year, history, and the problem (including any recent related repairs). And then after the problem gets fixed, help out everyone else by posting the fix :thumbup:
An

I have a 2005 aveo. We just replaced the alternator and now the "hold" light is flashing. we disconnected the battery to reset it, but within a few minutes it was flashing again. Any suggestions? I checked the manual it just says to take it in to be checked. Never had a problem before now. Thank you!!!

check to verify the wiring is correct, not pinched, not loose etc. the hold light requires proper spark signal and proper voltage to the transmission first.. then indicates if there are certain sensors failures

After reading the above comments we checked the plug at the air filter (was told it there was an o2 sensor there) to make sure it was plugged in. they said it wasnt completely plugged in, so did that.... the light didnt stop right then, but about half an hour later the light went off... its been off for over an hour but just hadnt shut the car off til now, so will let you know if it stays off etc.... Other than that is there anything else i should check as well? thank you so much for getting back to me!!!

if the light went out you should be good.

Well folks that is what fixed it! Havent had any more issues with it flashing "hold" or being locked in gear etc.... fuel milage sucks, the o2 sensor behind the catalitic converter went out, and a few quirks, other than that shes back to running right. thank you for all your help!

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Originally Posted by mreid

I have a 2005 aveo. We just replaced the alternator and now the "hold" light is flashing. we disconnected the battery to reset it, but within a few minutes it was flashing again. Any suggestions? I checked the manual it just says to take it in to be checked. Never had a problem before now. Thank you!!!

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most likely when putting back everything together you for forgot to plug in one of the sensors

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Originally Posted by ak1you

most likely when putting back everything together you for forgot to plug in one of the sensors

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yes, thank you! I posted above that we got it fixed, it was the plug at the air filter... if im correct that has an o2 sensor there. thank you though, i do appreciate any and all advice. have an awesome weekend!

Hes right. Any time the engine runs sluggish below a certain rpm then the ECU WILL send a signal to the transmission to NOT go into 4th gear so as to not over rev the engine. For me it was a bad Map sensor at $80. My code was #0107. It could be most any code though. A better description of this is on Answers.com under "Flash hold light" page 2.

You actually mean a Mass Air Flow sensor (MAF) at the air filter box, not a O-2 sensor.

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Originally Posted by patricklprice

You actually mean a Mass Air Flow sensor (MAF) at the air filter box, not a O-2 sensor.

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so is it the maf sensor or the O-2 sensor

No, it was definately the MAP sensor. That part controls allot! I saw it on either E-bay or Amazon where it was $27 each so I bought 2. Thats cheap considering they run around $80 at Auto Zone.
My situation is different then everyone else here because I have 2- 2005 Aveos LS the same year which allows me to part swap for testing purposes.

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Originally Posted by abeahdeep

so is it the maf sensor or the O-2 sensor

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I too have a Chevy Aveo 05, I am having same issues with the check engine and hold light flashing. now I noticed when the flashing starts I can park and turn off car. when I turn her back on the flashing has stopped and just the check engine light remains. there is misfirings yes but once the car warms up its not as bad. So a friend of mine said it could be spark plugs and also he works at Autozone so he was able to look up some things he printed prices for ignition coil. he said he will start with the changing of spark plugs since I haven't changed them. could be all. My boyfriend thinks the same too about the plugs. could that be the problem