2008 Aveo with 120,000 miles has P2135 code

[petrified.rabbit]

it will if something is rubbing against a part of the harness and rubs through enough to cause a short.

then it will show physical damage near a moving part OR show signs of it not being properly placed (like broken retaining clips).
IF the appearance of the harness has not changed, the harness does not wear with use. only outside forces.

[2010AveoLT]

then it will show physical damage near a moving part OR show signs of it not being properly placed (like broken retaining clips).
IF the appearance of the harness has not changed, the harness does not wear with use. only outside forces.

(this may be a Long Shot) What about an Internal Defect in the Harness due to a mistake in production or Assembly?

[aceharb]

Hello Rabbit

It is the same issue that I had above with the 2135 code. When I reset with my scanguage it clears and may redo for about a half mile a couple times. It does not stall, just limits rpm to about 700 RPM (limp mode) till CEL cleared. The rest of the day it is fine. The engine wiring harness is no longer the cause as suggested by the TSB initially

Yes, I had this problem as well. at first I had "Limp". I would just drive about a 1/4 mile and the limp mode would Engage. I would have to shut down and restart for it to clear the limp mode. any how my thoughts where the computer was processing low air intake, restricted fuel, or bad electrical. Turns out the spark plugs was throwing a weak spark. That caused the check engine light to flash. Ultimately making the computer issued the "limp mode". I first changed the spark plugs from ngk (the stock plugs OEM) to basic ac delco's. that ultimately solved my problem. my next step would be the plug wires then to the ignition coil. had i replaced all three parts would have rounded about $150 for all ac delco components. Hope this helps

[tacomafitch]

Well this 2135 code has come back again. It was good all summer but now that it is cooler up here in mass it has started to occure again. I am not sure but I wonder if the winter gas is out now and causing it. I still do not think it is the harness since it was good all summer. Any Ideas ? she has 161K miles now

[ranjmaz]

I just started getting 2135 after no codes all summer since I had my cat converter replaced under the fed emissions warranty. I'm alos getting 2188 and 0172. Car seems to be running fine and is getting about 7 MPG more since the new cat. I'm running homemade seafoam thru every fill up as well.

[tacomafitch]

The 2135 code came up last night nd then I ended up getting a 0303 code which is a number 3 misfire on my 2009 sedan with 163K miles. Dealer replaced the coil pack bar on top of the plugs and cleared the misfire. They are still leaning towards the harness for the 2135 code but symptoms dont convince me of that plus the cost

[tacomafitch]

the 2135 code continues on my 2009 with 165K miles. started it this am and it came on a few times before lleaving the driveway. The dealer still wants to change the harness at my expense of about $700 for the harness plus the installation. Even if it is the problem I should not have to replace as there are supposed know issues with the harness by chevy. As I said when toyota bought my tacoma back for way more than I paid for it chevy or ford would not have done this. May be time to go back to toyota and get rid of this aveo. I dont feel a wiring harness is a normal wear an tear item.

[ranjmaz]

Welcome to another cold midwest fall and the start of Aveo Codes. I'm starting to get 0302 and 0420. I haven't ran seafoam thru the vacuum in months, I think I'll let it soak for about 10 mins, then fire some more thru, etc. Fun times. Car doesn't appear to run rough. The idle is getting higher now that the weather is getting colder. Between 1000 and 1500 rpm on startup for a few seconds.