Over boost code solution questions !!!
#1
Over boost code solution questions !!!
So I'm new to the hhr ss been reading a lot of forums and comments just bought the car runs great other than throwing the P0234 code, so the question when doing a tune or tuner which creates more boost you have to do wide band o2s correct ? So if I did the o2s would I still be getting the over boost codes ? And if so what are good o2s other than the Aem ??? Thanks !!
#2
Welcome to the site! Try plugging P0234 into the search window there are many threads with solutions to your issues of overboost , most point to loose or broken wires, not the O2 sensors
P0234 Turbocharger/Supercharger 'A' Overboost Condition OBDII Engine Light Trouble Code | AutoCodes.com
P0234 Turbocharger/Supercharger 'A' Overboost Condition OBDII Engine Light Trouble Code | AutoCodes.com
#4
No it's completely stock with 90k miles im leaning towards the wastegate im hitting around 20lbs-23lbs what should stock be hitting ? Want to do the stage kit, would that solve the problem where I wouldn't have to change the wastegate for less boost ? Been reading also that if I do the stage kit have to have it tuned also can't just plug and play ?
#5
20-23 lbs. sounds just like the GMTU or another tune. Any chance the former owner had it tuned but didn't pass that on when it was sold ?
If it has the GMTU, it will have a sticker inside the fuel door that says : Premium Fuel Required
The stock sticker would say : Premium Fuel Recommended
Stock numbers are generally in the 14-17 range depending on the variables such as elevation.
Mine was around 14 stock. 19 when I got the GMTU.
The GMTU kit is not a plug/play. It's just the 2 Tmap sensors and some stickers. The new tune is then downloaded by the dealer and is a VIN specific upgrade to the purchased kit.
If it has the GMTU, it will have a sticker inside the fuel door that says : Premium Fuel Required
The stock sticker would say : Premium Fuel Recommended
Stock numbers are generally in the 14-17 range depending on the variables such as elevation.
Mine was around 14 stock. 19 when I got the GMTU.
The GMTU kit is not a plug/play. It's just the 2 Tmap sensors and some stickers. The new tune is then downloaded by the dealer and is a VIN specific upgrade to the purchased kit.
#6
20-23 lbs. sounds just like the GMTU or another tune. Any chance the former owner had it tuned but didn't pass that on when it was sold ?
If it has the GMTU, it will have a sticker inside the fuel door that says : Premium Fuel Required
The stock sticker would say : Premium Fuel Recommended
Stock numbers are generally in the 14-17 range depending on the variables such as elevation.
Mine was around 14 stock. 19 when I got the GMTU.
The GMTU kit is not a plug/play. It's just the 2 Tmap sensors and some stickers. The new tune is then downloaded by the dealer and is a VIN specific upgrade to the purchased kit.
If it has the GMTU, it will have a sticker inside the fuel door that says : Premium Fuel Required
The stock sticker would say : Premium Fuel Recommended
Stock numbers are generally in the 14-17 range depending on the variables such as elevation.
Mine was around 14 stock. 19 when I got the GMTU.
The GMTU kit is not a plug/play. It's just the 2 Tmap sensors and some stickers. The new tune is then downloaded by the dealer and is a VIN specific upgrade to the purchased kit.
#7
I'll check for those ! I don't know the previous owner bought it off a lot... If it had the tune and the 2 tmap sensors it wouldn't throw a p0234 code though under full throttle right ? Where do I go from here ? What can I do to stop the code and limp mode, it's frustrating lol
#9
May be the bypass valve sticking ? Or the vacuum line to it is off or broken. Easy to pull and check. Only a spring and rubber diaphram. (honestly. It's a little tricky to get the tools to it. 10mm socket on a 1/4 inch drive setup worked for me )
Here's a link with some pics: https://www.chevyhhr.net/forums/how-...acement-43763/
Here's a link with some pics: https://www.chevyhhr.net/forums/how-...acement-43763/
#10
May be the bypass valve sticking ? Or the vacuum line to it is off or broken. Easy to pull and check. Only a spring and rubber diaphram. (honestly. It's a little tricky to get the tools to it. 10mm socket on a 1/4 inch drive setup worked for me )
Here's a link with some pics: https://www.chevyhhr.net/forums/how-...acement-43763/
Here's a link with some pics: https://www.chevyhhr.net/forums/how-...acement-43763/
Thank you ! Looks like I have some trials and errors to try and hopefully fix the issues ! Thank you everyone for the input !