Not shifting properly when accelerating fast from a stop?

JBENZ2679

MEMBER
2011 MAZDA 6
2.5L
4 CYL
2WD
AUTOMATIC
159,000 MILES

If I hit the gas too hard from a complete stop the RPMs will go up to almost 5 and won't shift unless I let off gas. The same thing will happen in other gears if I try to hit it too hard.

Tuesday, May 2nd, 2023 AT 8:22 AM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,883 POSTS

This sounds like the turbine shaft sensor is going out, but we should scan for codes.

This guide will help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is the turbine shaft speed sensor location so you can change it out in case you need it. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

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Tuesday, May 2nd, 2023 AT 10:17 AM

JBENZ2679

MEMBER
23 POSTS

So, no check engine light, but I checked for codes anyways, but no codes and the pics aren't very detailed looks like that sensor is on top on the engine.

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Wednesday, May 3rd, 2023 AT 2:38 PM

KEN L

MASTER CERTIFIED MECHANIC
42,883 POSTS

I had a thought it could be a partially clogged catalytic converter. This will cause low vacuum and cause the transmission to shift late and hard. Please go over this guide to help confirm the issue.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please go over this guide and report back.

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Thursday, May 4th, 2023 AT 11:15 AM