I’ve got a Vauxhall (uk version of a GM/Opel) Zafira A
We keep having power steering problems with it. The problems seem to happen if we leave the car for about 5-10 mins in ignition position 3 (so the electrics are on but the engine isn’t running).
When we then go to start the engine we find out the power steering doesn’t work for about 10 mins (like as if it’s charging the battery up or something - it takes less time to get going if we rev the engine a bit.
The power steering is electronic, and we’re trying to decide whether or not the problem is caused by the battery.
The battery itself is the same age as the car (the car was made in 2005 so it’s about 13 years old now).
We’ve had the battery tested a few times and all the times the battery comes back with amazing results, one garage was surprised that the battery was actually still holding 13.5V despite the age.
Could batteries develop a fault that wouldn’t show up on a battery tester, or is it more likely to be the power steering unit? Either parts are quite expensive and we’d ideally want to replace the right one.
With the current battery the car does start fine, there has been one or two times when we’ve had to do a second start but it’s not that usual.