Transmission will not select gears automatically?

LLAB1957

MEMBER
2007 HOLDEN ASTRA
0.8L
4 CYL
2WD
19,688 MILES

Removed the head and replaced valves and resembled. Car runs fine transmission has fluid but will not select gears automatically but will select manually. Transmission was working before I removed the head. Fuses are good.

Friday, October 18th, 2024 AT 9:32 PM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
47,526 POSTS

I would make sure all the of systems ground are connected, they can be left off while doing a big job like a cylinder head removal. If the grounds are all good let's run the codes to see which ones are stored, this guide can help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please go over this guide and get back to us. Can I ask if this car has a cable running to the throttle body?