2018 tour x intermittent starting issue

[hammeranonymous]

Anyone have intermittent starting issues?...

 

[bollox74]

Welcome to the forum - we have a lot of collective info but maybe frame yr Q with a little more info.

Our cars are notorious battery consumers so first stop is check your battery. Also check your key fob for a fresh battery, little buggers can act funny when they don't "handshake" with the car.

Otherwise the old fuel, oxy, spark. It's likely one of them (without more to go on)

 

[hammeranonymous]

Thanks for taking a moment to respond.... Much appreciated.
So a short back story:
Car ran perfectly. One day didn't start. No codes.
Battery checked out good. Tried to jump, no start.
Towed to dealer... Diagnosed as bad starter.
(They wanted $1600 for diagnose and replace starter)
Towed car home, replaced starter ourselves.
Car ran great for two days, then didn't.
Wouldn't start. Wouldn't jump.
Battery checked good.
Arrangements made to tow back to dealer, knowin starter is good.
Tow driver arrives and Drove the car onto the dolly.
Drop off at mechanics, drove off the truck.
Mechanic starts the car multiple times.
Car starts.
Then it didn't.
Several attempts later starts....
Fob battery good, no fuse blown.
Possible relay? Ignition?
WTF

 

[saab93driver]

Thanks for taking a moment to respond.... Much appreciated.
So a short back story:
Car ran perfectly. One day didn't start. No codes.
Battery checked out good. Tried to jump, no start.
Towed to dealer... Diagnosed as bad starter.
(They wanted $1600 for diagnose and replace starter)
Towed car home, replaced starter ourselves.
Car ran great for two days, then didn't.
Wouldn't start. Wouldn't jump.
Battery checked good.
Arrangements made to tow back to dealer, knowin starter is good.
Tow driver arrives and Drove the car onto the dolly.
Drop off at mechanics, drove off the truck.
Mechanic starts the car multiple times.
Car starts.
Then it didn't.
Several attempts later starts....
Fob battery good, no fuse blown.
Possible relay? Ignition?
WTF

I assume by not start you mean it doesn't crank, not that it cranks but won't fire up.

Starting car from seat besides fob present car needs to think it's in Park and see that the brake pedal is pushed. Maybe something like a shifter switch or brake switch is not sending right signal and starter won't engage. Also just the starter pushbutton itself could be wonky.

Does your car have remote start feature, either from FOB or Buick app? Might be worth a try to see if it will do that.

 

[hammeranonymous]

I assume by not start you mean it doesn't crank, not that it cranks but won't fire up.

Starting car from seat besides fob present car needs to think it's in Park and see that the brake pedal is pushed. Maybe something like a shifter switch or brake switch is not sending right signal and starter won't engage. Also just the starter pushbutton itself could be wonky.

Does your car have remote start feature, either from FOB or Buick app? Might be worth a try to see if it will do that.

Thank you yet again!!!!
Those are very good suggestions and assumptions that I have made.
I may have taken those for granted as all working, but I'll do my due diligence and track each button/pedal/ shifter.

 

[Amct15]

Thank you yet again!!!!
Those are very good suggestions and assumptions that I have made.
I may have taken those for granted as all working, but I'll do my due diligence and track each button/pedal/ shifter.

Have you tried using the other key fob for awhile? If you have it.

 

[hammeranonymous]

Have you tried using the other key fob for awhile? If you have it.

Yep. Made certain to just go ahead and replace both fob batteries.

 

[hammeranonymous]

I assume by not start you mean it doesn't crank, not that it cranks but won't fire up.

Starting car from seat besides fob present car needs to think it's in Park and see that the brake pedal is pushed. Maybe something like a shifter switch or brake switch is not sending right signal and starter won't engage. Also just the starter pushbutton itself could be wonky.

Does your car have remote start feature, either from FOB or Buick app? Might be worth a try to see if it will do that.

Hey there....I was curious and wanted to ask how does one go about testing those individual components of the ignition system?....( pedal sensor thing, the ignition button itself, the shifter reader, etc?.... Any light to shine?

 

[Amct15]

Hey there....I was curious and wanted to ask how does one go about testing those individual components of the ignition system?....( pedal sensor thing, the ignition button itself, the shifter reader, etc?.... Any light to shine?

Does the car always “Wake up” when you open the door and step inside? Splash screen on the radio, DIC screen directly in front of you lighting up?

If you go in the car without the key fob, and press the start button with your foot off the brake, you should see something like key fob not detected in the DIC screen.

If the key fob is in the vehicle, pressing the start button without brake press, puts it in accessory mode. You should be able to perform normal accessory functions like windows, radio etc. You should also see “Press brake pedal to start” in the DIC.