Lights appearing on dashboard and causing the steering to be stiff sometimes?

He said that the clock on the instrument cluster wasn't raising on motion as well. The bulbs were replaced.
I checked for the DTC yesterday. The codes I found were P0335 and P0500. That's the CKP sensor and vehicle speed sensor code. When I cleared the code the check engine light went off. But later came back ON few minutes later.
Symptoms with the car was that the engine was vibrating, hard starting and can't move freely when on the hill.

The client is a novice about cars and was unable to give me a good explanation. I didn't see any sign of airbag shooting when I saw the car after is complaint. I told him that the airbag is still okay. He made a mistake in his explanation. The only thing I saw was that the ABS connector was unplugged and headlights were bad in the car.
What I noticed from the car was that when it is first started the RPM rises to about 2,500 and then drops to about 700 RPM on its own.
Probably there could be a short on the instrument cluster as well because I noticed a blink once after about every 25 seconds throughout idling except the car is shut-off. He said that was how it was when he purchased the car from someone till date.
In addition, the speed clock doesn't raise when driving and the car is intermittently hard to start.
P0335 and P0500 were the only codes I retrieved.

For the CAN test, I don't have the tool yet nor do my fellow engineers over here.

I'm sorry, it has taken a very long time to respond to your email! The client never came back since then. However, he told me that he would. Whenever he does, I would communicate to you about what I notice.