2009 LS460 won’t start
Yesterday car drove fine, I parked, went to my grannies, came back down to leave and it wouldn’t start. Tried to jump it, nothing. Then I started getting dash messages, check VSC system, parking brake not available, low battery start car, then after a while the dash lights started trippin then nothing came on no lights nothing. So we disconnected the battery, got a new one, installed it this morning, all the lights are coming on everything works no more error messages, no codes on the scanner, but it still won’t start won’t even turn over. I also changed the battery in my fob prior to this incident it had been telling me low key battery contact dealership so I changed the battery. And again Still not starting.
I’ve never had any issues starting my car so I don’t think it’s the starter, everything I’m reading leads me to think I need to reprogram my fob, maybe it’s not communicating correctly??
very frustrated and not in the position to cover costly diagnostics from service techs, if anyone knows what’s happening please share I’d really appreciate it!
Update: starter fuse was blown, replaced it with jcase 30amp, but still not starting.
I’ve never had any issues starting my car so I don’t think it’s the starter, everything I’m reading leads me to think I need to reprogram my fob, maybe it’s not communicating correctly??
very frustrated and not in the position to cover costly diagnostics from service techs, if anyone knows what’s happening please share I’d really appreciate it!
Update: starter fuse was blown, replaced it with jcase 30amp, but still not starting.
Last edited by LS460chic; Mar 30, 2025 at 07:13 PM.
Fuel Rail Pressure Sensor. I had the same issue after I left the car on overnight. Jumped the car, was able to get it started but it turned off immediately. Then wont start after that. Reset the ECU for a few hours and it will start and shut off. No check engine light.
What happen is the fuel rail pressure sensor is bad and will short circuit the ECU.
Replaced the sensor, located under the intake manifold and everything was fixed.
What happen is the fuel rail pressure sensor is bad and will short circuit the ECU.
Replaced the sensor, located under the intake manifold and everything was fixed.
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It hadn’t been changed since I bought the car so I installed it the same way it was installed prior to when taken off..
that's the only way to get the starter out, you'll also need to remove the motor mount/ bracket, alternator, sway bar and oil dip stick as well. You may want to purchase new gaskets for the mani and down pipe too. Make sure you have a jack to raise the engine a bit to give more space it's not too difficult I can send a full walk through vid I found on yt to help guide you.
that's the only way to get the starter out, you'll also need to remove the motor mount/ bracket, alternator, sway bar and oil dip stick as well. You may want to purchase new gaskets for the mani and down pipe too. Make sure you have a jack to raise the engine a bit to give more space it's not too difficult I can send a full walk through vid I found on yt to help guide you.
that would be amazing! thank you so much!!







