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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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2017 Mustang GT - On starting up in a store parking lot, a

Customer Question

2017 Mustang GT - On starting up in a store parking lot, a warning light that I've never seen before and s not mentioned or shown in the owner manual....lit up today. A red wrench!
JA: Just to clarify, what are the exact lights you're talking about?
Customer: A red wrench symbol light on the Tach screen. When I started the car it bucked, and shook. The radio came on by itself and the rpm was changing by itself. I quickly shut it off. I wiated a few minutes and tried again and now irt ran OK. Got home waited an hour and started again and it did the same bad start-up. I shut it down.
JA: Are you fixing your Mustang GT yourself? What have you tried so far?
Customer: I havn't gone any further. I called my Ford dealer where I purchased the car and have always had it serviced there. I ask for any help, but they could not offer anything. I asked if I could bring in on tomorrow and was told they are fully loaded for service but I could leave it for a few days they might be able to look at it. Not much help for a repeat customer for the last 20 years.
JA: Anything else you want the mechanic to know before I connect you?
Customer: Not that I can think of. No new work or service. I have 63K miles and never had any problems only normal maintenance.
Submitted: 1 month ago.
Category: Ford
Expert:  Gunvir Singh replied 1 month ago.

Hello, let me review your request. Please stand by.

Expert:  Gunvir Singh replied 1 month ago.

Did it stop shaking when you accelerated?

Customer: replied 1 month ago.
Most most important question: Does this issue need immediate help at my Ford dealer? When I spoke with a Service Rep yesterday they were not familiar with the wrench warning light or the root cause of the warning. And said they were fully booked for service.
Expert:  Gunvir Singh replied 1 month ago.

The wrench light on this model is assosiated with the throttle system and transmission. I will recommend to take it to the dealer immediately to prevent additional damage or failure when driving.