What will cause a 2006 Lexus IS350 to not turn over, car has power but won’t stay cranked?

Question

I have an 06 IS350 that won’t start. When I put my foot on the break and push the start button 1 time I don’t hear and noises, when I hit it a second time it’s not wanting to crank over. Everything powers on and warning lights on the  dash come on but won’t completely turn over. When it does it’s for maybe 30-60 seconds and the car dies again. My check engine light, check VSC, ABS, and P/S lights are on. I have changed the MAF sensor and recently replaced the spark plugs due to a misfire. I am also have 8 Electronic-Controlled Power Steering codes pop up C0226,C0236,C0246,C0256,C0278, C1201, C1223 ABS Control System Malfunction, C1249 Open Circuit. I also have 3 codes pertaining to the O2 sensors, P0171 System Too Lean Bank, P0174 System Too Lean Bank 2.
PLEASE HELP ME…I CANT keep replacing parts that are not the issue. I do have it a mechanic but he can’t figure it out either! Could someone PLEASE give me some in-site on what to do!?!?

 Thank you in advance!

Answer 1

I'm sorry to hear about the issues you're experiencing with your IS350. It sounds like you're dealing with multiple problems

The fact that you don't hear any noise when you push the start button the first time could indicate a problem with the starter motor or the ignition system. Since you mentioned that everything powers on, it's possible that the issue lies with the starter motor. It might be worth having it checked or even replaced if necessary.

The presence of multiple trouble codes, including those related to the O2 sensors and the lean fuel mixture, suggests a potential problem with the fuel delivery system or air intake system. The lean condition could be causing the misfire you mentioned. Inspect the air intake for any leaks, such as cracked hoses or loose connections. Additionally, consider checking the fuel pressure and the fuel injectors to ensure they are functioning properly.

The EPS codes you mentioned indicate a problem with the power steering system. This could be related to faulty sensors, wiring issues, or a malfunctioning power steering control module.