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foobarbecue an hour ago

What model? Is it possible that you accidentally had the car in a power-on mode, but without the engine started? I've done that by accident in my Mitsubishi Outlander Sport. The symptoms are similar to what you describe. Actually, it was at a car wash -- attendant left the car power on and I thought the engine was running so tried to drive away. Got the car to move a bit (happened to be downhill) but it was super scary because the brake pedal was taking more and more force to push down and I could barely turn the steering wheel. Luckily I was smart enough to put it in park, check everything, and realize the engine wasn't running!

The brakes (n.b., spelling) and steering will feel increasingly stiff or "locked up" if your engine is off because the engine is not powering the vacuum system that powers the brake booster, and the steering will be extremely difficult to operate without the assistance of power steering.

freakynit an hour ago | parent [-]

Yep yep yep.. that explains it. Not the software fault as I original suspected (at least in the break-jamming case). What I "felt" like jammed was probably just that vacuum system not helping, but since it happened for the first time (with me), and so abruptly, it felt like the brakes were jammed.

But, the worrying, and a lot more scarier part is that this was not me accidentally leaving the car in accessory/power-on mode. The engine cut out while I was driving, which is itself a serious fault.

Regarding the steering wheel case, it still feels like electronic/software fault since the car was actually reversing on engine power. But, similar to the first case, most likely it was also not jammed, rather, i lost the power steering assist, and hence, it "felt" like jammed since it happened first time to me.

Im from India btw and the car in question is a 10+ year old Maruti Suzuki Swift Dzire.

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Summary:

1. Break issue: vacuum assist lost due to engine shutting off (by itself) which "felt" like it "jammed" the breaks, but, most probably had just gotten super stiff instead.

2. Steering wheel: Still looks like a software/electronic fault, but, similar to the break case, it "felt" like jammed.. but, it had just gotten super stiff.

This all, however, is still so wrong. In either of the cases the fault was not mine, yet, I was put in a situation that could have been very serious.

freakynit an hour ago | parent [-]

So I researched a bit more on that break thingy... and just learned that this assist provides anywhere form 4x to 10x the assist. And without it, you would literally have to stand on the breaks with full body weight to have a similar effect. Wow!!