Total Code Freak Out after Oil Change - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

myjcaustin · 01-16-2026, 12:22 PM

Yesterday I did an oil change on my 2013 Camaro 6 cyl. Simple.
Opened filter cover and replaced filter. Drained Oil. Replaced oil plug. Added 6 qts of oil.
Started car to check oil pressure. gage showed proper pressure, but I could notice an idle miss. after a few minutes the car shut off. Restarted and was worse. Engin light came on. Code reader show 8 codes!
I have never had any issues with the engine or fuel system before. How can changing the oil cause all this?
Codes: PO 151, PO 300, PO 506, PO 157.
Any Help or understanding would be very appreciated.

1JEWLDSSRS · 01-16-2026, 12:32 PM

Quote:

Originally Posted by myjcaustin

Yesterday I did an oil change on my 2013 Camaro 6 cyl. Simple.
Opened filter cover and replaced filter. Drained Oil. Replaced oil plug. Added 6 qts of oil.
Started car to check oil pressure. gage showed proper pressure, but I could notice an idle miss. after a few minutes the car shut off. Restarted and was worse. Engin light came on. Code reader show 8 codes!
I have never had any issues with the engine or fuel system before. How can changing the oil cause all this?
Codes: PO 151, PO 300, PO 506, PO 157.
Any Help or understanding would be very appreciated.

Has the car been sitting for a while? How old is the battery? Sometimes these cars freak out when the battery has low voltage. Check the health of your battery first.

gtstorey · 01-16-2026, 03:25 PM

If not battery, then check wiring under the car for issues with bank 2 o2 sensors. 2 of the codes are front and back o2 low voltages codes and an issue there could cause the other codes.

myjcaustin · 01-16-2026, 06:58 PM

Figured it out. Vacuum leak. Tube coming out of top of throttle body cover had broken. Going to order a new one but for now I fixed it by connecting broken ends with a piece of rubber hose and clamps. Back to normal. Test drive showed no issues with maintaining normal gas to air problems. no more check engine light. All clear.

1JEWLDSSRS · 01-16-2026, 07:35 PM

Quote:

Originally Posted by myjcaustin

Figured it out. Vacuum leak. Tube coming out of top of throttle body cover had broken. Going to order a new one but for now I fixed it by connecting broken ends with a piece of rubber hose and clamps. Back to normal. Test drive showed no issues with maintaining normal gas to air problems. no more check engine light. All clear.

Awesome!Always nice to have a "simple" fix once in a while. Thanks for letting us know.

CamaroDreams76 · 01-16-2026, 07:37 PM

Quote:

Originally Posted by myjcaustin

Figured it out. Vacuum leak. Tube coming out of top of throttle body cover had broken. Going to order a new one but for now I fixed it by connecting broken ends with a piece of rubber hose and clamps. Back to normal. Test drive showed no issues with maintaining normal gas to air problems. no more check engine light. All clear.

Thanks for checking back in and telling us what was wrong. Glad you found the issue and it was simple

01-16-2026, 12:22 PM	#1
myjcaustin Drives: 2013 Camaro LT Convertable Join Date: Oct 2023 Location: Georgia Posts: 2	Total Code Freak Out after Oil Change Yesterday I did an oil change on my 2013 Camaro 6 cyl. Simple. Opened filter cover and replaced filter. Drained Oil. Replaced oil plug. Added 6 qts of oil. Started car to check oil pressure. gage showed proper pressure, but I could notice an idle miss. after a few minutes the car shut off. Restarted and was worse. Engin light came on. Code reader show 8 codes! I have never had any issues with the engine or fuel system before. How can changing the oil cause all this? Codes: PO 151, PO 300, PO 506, PO 157. Any Help or understanding would be very appreciated.

01-16-2026, 03:25 PM	#3
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,459	If not battery, then check wiring under the car for issues with bank 2 o2 sensors. 2 of the codes are front and back o2 low voltages codes and an issue there could cause the other codes.

01-16-2026, 06:58 PM	#4
myjcaustin Drives: 2013 Camaro LT Convertable Join Date: Oct 2023 Location: Georgia Posts: 2	Figured it out. Vacuum leak. Tube coming out of top of throttle body cover had broken. Going to order a new one but for now I fixed it by connecting broken ends with a piece of rubber hose and clamps. Back to normal. Test drive showed no issues with maintaining normal gas to air problems. no more check engine light. All clear.