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Drew, Super Mazda Tech.
Category: Mazda
Satisfied Customers: 2188
Experience:  19 yrs. experience. Mazda Senior Certified Tech, with Ford, Linc. & Merc. experience. ASE L1 Advanced Certified Master Tech.
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It jumps from auto to manual without moving shifting handle,

Customer Question

it jumps from auto to manual without moving shifting handle
JA: How old is the transmission? Have you noticed any leaking?
Customer: its a 2004 ... no leaking as far as i can tell
JA: What is the model of your '04 Mazda?
Customer: 3
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: took it too mechanic who sending me to a tran shop ... also check engine light is on
JA: Anything else you want the mechanic to know before I connect you?
Customer: had the mechanic check it before and they said it was probably a defective speed sensor?
Submitted: 4 months ago.
Category: Mazda
Expert:  Ron replied 4 months ago.

Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

Expert:  Ron replied 4 months ago.

Do you happen to know the fault code and or codes that should be setting when the check engine light comes on?

Customer: replied 4 months ago.
Expert:  Ron replied 4 months ago.

Can you get these for me as it would be very helpful is trying to determine the cause.

Also need to know the model of you 2004 Mazda as well as engine size.