My check engine light is on on my 2007 SRX it registers as a misfire on cylinder 4, what do I do?

I would say you have more that one code fault and they just used a cheap scan tool. You need an auto electrician with a pro grade scan tool computer. That is the only thing that can diagnose the engine speed sensor.

https://www.google.com/search?q=auto+electrician+near+me

What the P0304 code means. The P0304 code will be seen in cars where the ECU has detected that cylinder 4 is not firing properly. The ECU monitors the operation of all cylinders to ensure they are all firing on time, so when one misfires repeatedly, a Check Engine Light is set.

P0304 OBD-II Trouble Code: Cylinder 4 Misfire Detected

https://www.yourmechanic.com > Articles

Black smoke - running rich
flashing check engine light - severe engine misfire .
A flashing " check engine " light means that an engine cylinder misfire has been. detected . You can drive it in for repair , just avoid any rapid acceleration or. deceleration because you can damage the catalytic converter. A flashing " check engine " light means that an engine cylinder misfire has been. detected

P0300: Random Cylinder Misfire Condition
http://www.autocodes.com/p0300_toyota.html

P0301: Cylinder 1 Misfire Detected
http://www.autocodes.com/p0301_toyota.html

P0304: Cylinder 4 Misfire Detected
http://www.autocodes.com/p0304_volkswagen.html

Check Engine Light/Misfire Due to Intake Valve Locks ...

repairpal.com > Problems > Jeep > Liberty

Jeep Liberty Check Engine Light/Misfire Due to Intake Valve Locks/Valves. ...Misfire cyc 4 and random cyc misfires, changed coil packs and plugs... sounds as if rod ... Light came on again (misfire on cylinder 4) - switched coil from 4 to 2. Light ...

Jeep Liberty Questions - Cylinder Misfire code - CarGurus

www.cargurus.com > Questions > Jeep > Liberty

CarGurusMay 27, 2009 - #4 misfire new plugs and coil pack on #4 light came back on after 300 miles if ... How come it stopped misfiring for 2-3 months, and now is back? ... I have a 2005 Jeep Liberty 6 cylinder, engine light came on scaned the codes ...

Liberty Cylinder Misfire / Computer issue? - JeepForum.com

Error code p0300 indicates rough idle and p0305 indicates engine misfire in cylinder 5. Check for faulty spark plug and its wiring. Also check for ignition coil and distributor. Replacing spark plug and its wiring may resolve the issue.

sounds like they have done a good job, save up your money, wont be cheap most likely

For engine misfiring problem check the help links mentioned below. Click the link below to go through the troubleshooting procedure :---- Engine misses and truck jumps? Hard to down shift? Issue with high gear only? http://technoanswers.blogspot.in/2012/02/engine-miss-and-truck-jumps-hard-to.html

-----------
Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

-----------
While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

------------
Engine Misfire codes for car?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

--------------
Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

-----------
Oil on spark plugs and car misfires?

http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

----------

This will help.

Thanks.

when the check engine light blinks this is a sign of misfires but your going to need a scanner to determine which cylinders misfired and clear fault memory i would then recommend swapping coils and plugs from cylinders that misfired with ones that didnt and see if misfires migrate to determine bad coils or plugs

Check Lights are OBD2 System Malfunctions,
that have been with us for 30 years,nothing to
do with oil.

You most likely have cylinder misfires, that need
to be diagnosed,or one of ten other possibles

well i had a 98 dodge neon that seems like it did the same and it said engine misfire and all i did was due a tune up change spark plugs and wires.