The check engine light can also mean you have a transmission problem which would be my guess. You need to have the ECU scanned with an OBD2 scan tool. This will bring up the code that has been stored by the computer. It could be minor and could be serious so do not ignore this or you may end up with a very expensive transmission repair. A professional can take the code and know where to look for the problem. Transmission repair needs to be done by a pro, as this is not a DIY repair. Stay away from chain transmission shops. Seek a trusted pro that family and friends recommend or take it to the dealer who sold you the car. Good luck and I hope it is nothing serious.
There are many probable causes for this problem, you said checked the transmission fluid and it looked OK, first thing you should do is to make sure the fluid quality and level is good if positive and still having problems I recommend changing the fluid and fluid filter. If the problem still persists, then it might be caused by Transmission Control Module, a sensor or solenoid, or the circuit itself ( you mentioned the flashing engine light, the problem can be caused by a faulty sensor or circuitry). if the first simple remedy doesn't work I recommend taking the car to a professional to have a look at the probable problematic parts I mentioned. Have a look at it and let me know if you need more advice. Best
Remove your cats, they have melted close ie your exhaust is plugged up
For
car not changing gears it can be shifter assembly issue, or it can also be
transmission issue. Get the shifter assembly inspected with ignition OFF.
For
more troubleshooting, I suggest you to get the Following help link checked, its
complete step by step procedure to inspect gear shift issues: -----
GEAR SHIFT ISSUES
http://alltypesofpartsreplacing.blogspot.com/2012/11/gear-shift-issues.html
==========
TRANSMISSION GEARS SLIPPING AND
FLUID LEAKING ISSUES
Transmission
gear assembly and transmission needs inspection. Also check the transmission
fluid level. Also is the fluid getting leaked or its low.
There
are few very helpful links with solutions to troubleshoot this problem.
========
I
suggest you to refer these links.
Click
the link below:-----
2000 Toyota Camry: Transmission slipping and Stuck up?
http://whatisbyme.blogspot.in/2012/05/2000-toyota-camry-transmission-slipping.html
-----------
Transmission Slips out of 2nd gear?
http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html
----------
Car engine Overheats and transmission starts slipping?
http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
-------------
2006 Ford Explorer: Engine Vibrates and gears slipping?
http://whatisbyme.blogspot.in/2012/06/2006ford-explorer-engine-vibrates-and.html
---------------
Clutch slipping problem?
http://howtobyme.blogspot.in/2012/03/clutch-slipping-problem.html
----------
Dodge Anti slip System is not operating?
http://whatisbyme.blogspot.in/2012/07/dodge-anti-slip-system-is-not-operating.html
----------
OD light flashing and transmission fluid leaking?
http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html
------------
Transmission fluid leaks near radiator on ford windstar?
http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html
-------------
Ford Windstar transmission fluid leaking?
http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html
-----------
These
details will help.
Thanks.
http://howtobyme.blogspot.com/2011/11/automatic-transmission-will-not-go-into.html
---------
Automatic transmission shift lever
issues?-------
http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html
-----------
AUTOMATIC TRANSMISSION FLUID LEVEL? --
http://schematicsdiagram.blogspot.com/2011/07/how-to-check-automatic-transmission.html
--------------
AUTOMATIC TRANSMISSION FLUID AND
FILTER?
http://schematicsdiagram.blogspot.com/2011/07/how-to-change-automatic-transmission.html
-----------
Transmission fault light on
car dash?
http://schematicsdiagram.blogspot.com/2011/12/transmission-fault-light-on-car-dash.html
--------
Transmission shifting
problem?
http://schematicsdiagram.blogspot.com/2012/01/transmission-shifting-problem-on-toyota.html
--------
Transmission Slips out of 2nd gear?
http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html
-----------
OD light flashing and transmission fluid
leaking?
http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html
----------
Why Transmission fluid leaks near radiator?
http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html
----------
Transmission fluid leaking?
http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html
-------------
****** wont go in reverse?
http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html
-------------
Automatic transmission will not go into
reverse?
http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html
----------
Transmission is making buzzing noise?
http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html
-----------
This
will help.
Thanks.
http://howtobyme.blogspot.com/2011/11/automatic-transmission-will-not-go-into.html
---------
Automatic transmission shift lever
issues?-------
http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html
-----------
AUTOMATIC TRANSMISSION FLUID LEVEL? --
http://schematicsdiagram.blogspot.com/2011/07/how-to-check-automatic-transmission.html
--------------
AUTOMATIC TRANSMISSION FLUID AND
FILTER?
http://schematicsdiagram.blogspot.com/2011/07/how-to-change-automatic-transmission.html
-----------
Transmission fault light on
car dash?
http://schematicsdiagram.blogspot.com/2011/12/transmission-fault-light-on-car-dash.html
--------
Transmission shifting
problem?
http://schematicsdiagram.blogspot.com/2012/01/transmission-shifting-problem-on-toyota.html
--------
Transmission Slips out of 2nd gear?
http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html
-----------
OD light flashing and transmission fluid
leaking?
http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html
----------
Why Transmission fluid leaks near radiator?
http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html
----------
Transmission fluid leaking?
http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html
-------------
****** wont go in reverse?
http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html
-------------
Automatic transmission will not go into
reverse?
http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html
----------
Transmission is making buzzing noise?
http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html
-----------
This
will help.
Thanks.
http://howtobyme.blogspot.com/2011/11/automatic-transmission-will-not-go-into.html
---------
Automatic transmission shift lever
issues?-------
http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html
-----------
AUTOMATIC TRANSMISSION FLUID LEVEL? --
http://schematicsdiagram.blogspot.com/2011/07/how-to-check-automatic-transmission.html
--------------
AUTOMATIC TRANSMISSION FLUID AND
FILTER?
http://schematicsdiagram.blogspot.com/2011/07/how-to-change-automatic-transmission.html
-----------
Transmission fault light on
car dash?
http://schematicsdiagram.blogspot.com/2011/12/transmission-fault-light-on-car-dash.html
--------
Transmission shifting
problem?
http://schematicsdiagram.blogspot.com/2012/01/transmission-shifting-problem-on-toyota.html
--------
Transmission Slips out of 2nd gear?
http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html
-----------
OD light flashing and transmission fluid
leaking?
http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html
----------
Why Transmission fluid leaks near radiator?
http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html
----------
Transmission fluid leaking?
http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html
-------------
****** wont go in reverse?
http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html
-------------
Automatic transmission will not go into
reverse?
http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html
----------
Transmission is making buzzing noise?
http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html
-----------
This
will help.
Thanks.
http://howtobyme.blogspot.com/2011/11/automatic-transmission-will-not-go-into.html
---------
Automatic transmission shift lever issues?-------
http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html
-----------
AUTOMATIC TRANSMISSION FLUID LEVEL? --
http://schematicsdiagram.blogspot.com/2011/07/how-to-check-automatic-transmission.html
--------------
AUTOMATIC TRANSMISSION FLUID AND FILTER?
http://schematicsdiagram.blogspot.com/2011/07/how-to-change-automatic-transmission.html
-----------
Transmission fault light on car dash?
http://schematicsdiagram.blogspot.com/2011/12/transmission-fault-light-on-car-dash.html
--------
Transmission shifting problem?
http://schematicsdiagram.blogspot.com/2012/01/transmission-shifting-problem-on-toyota.html
--------
Transmission Slips out of 2nd gear?
http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html
-----------
OD light flashing and transmission fluid leaking?
http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html
----------
Why Transmission fluid leaks near radiator?
http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html
----------
transmission fluid leaking?
http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html
-------------
****** wont go in reverse?
http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html
-------------
Automatic transmission will not go into reverse?
http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html
----------
Transmission is making buzzing noise?
http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html
-----------
This will help.
Thanks.
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Usually answered in minutes!
MY 2003 H2 STARTS AND RUNS. BUT ONCE I GET TO 25MPH IT DOES ACCELERATE BUT REFUSES TO GO ANY FASTER. IT ACTS AS IF THE TRANSMISSION IS SLIPPING OR POPS OUT OF GEAR. THE CHECK ENGINE LIGHT IS FLASHING. I CHECKED ALL THE FLUIDS AND SEEM TO BE FINE. I ALSO PULLED THE MASS AIR SENSOR AND SPRAYED IT DOWN WITH CARBURATOR CLEANER. I ALSO REPLACED THE SPARK PLUGS AND THE PCV VALVE AND THE LIGHT REMAINS ON. I USED MY AUTO SCANNER AND I GOT A P0300 CODE. I WILL REPLACE THE SPARK PLUG WIRES TOMORROW. BUT I DONT THINK THIS WILL AFFECT THE WAY IS SHIFTING GEARS. WHICH SENSOR COULD BE CAUSING IT TO INTERFERE WITH THE ******* OF GEARS?
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