Need to check codes on my 2000 mercury sable, I don't have a diagnostic tool. How can I check code? can I jump pins to get flashing light codes?

Question edited for clarity and typo.
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It is all in here.

2000 Mercury Sable Car Stereo Wire Colors and Locations

https://www.the12volt.com > installbay > stereodetail
2000 Mercury Sable Stereo Wiring ; Ground, Black/Light Green ; Illumination, Light Blue/Red ; Dimmer, n/a ; Antenna, Left Rear ; Front Speakers, 5" x 7" Doors.


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There is probably a way to access codes by using a jumper and causing the engine checklight or an integral led to flash in groups. I can't say which pin or pins need jumping.

I suggest you ask the question of google and click on the youtube video.

O2 sensor po136,front and back sensor to be replace.

Auto Zone, Advance Auto and the like will plug a diagnostic box in for free to tell you which component is throwing the code.

The Sable received another redesign in 2000, which minimized some of the oval design elements from the 1996 model, replacing them with more conventional styling. The redesign also featured a taller roof over the rear-passenger space, to increase passenger headroom that had been sacrificed by the tapered 1996 design.
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diagnostic tools

Code # 301??? That is NOT a valid Diagnostic Test Code (DTC) for the engine control system on a 2000 Mercury Sable.

Assuming that you mean P0301, that is a cylinder misfire code that is identifying number 3 cylinder as the cylinder with the misfire problem. MANY things can cause a cylinder to misfire including spark plugs, spark plug wires or boots, burnt valves, broken valve springs, blow head gaskets, cracked cylinder heads, bad or dirty injectors, faulty injector control circuits, Failed ignition coils...the list goes on....proper diagnosis required.

Rough idling can be caused be `ye olde vacuume leake'.HaHa!
So check for THAT first.I have also seen those cars eat a set of spark plugs and wiring pretty fast, so remove a coupla' plugs(they're easy to get to if engine's cold)and check their condition. (:^) don-ohio

Under hood, driver side, front side of strut tower, mounted to fenderwell

Note, this is an OBD1 connector. You will need an OBD1 scanner to read codes.

Alternate methods to extract trouble codes:

USING THE ANALOG VOLTMETER See Figures 3 and 4
Service codes will be represented by pulsing or sweeping movements of the voltmeter's needle across the dial face of the voltmeter. Therefore, a single digit number of 3 will be reported by 3 needle sweeps. However, a service code is represented by a 2-digit or 3-digit number, such as 23. As a result, the Self-Test service code of 23 will appear on the voltmeter as 2 needle sweeps, then after a 2 second pause, the needle will sweep 3 times.
Connect the analog voltmeter as follows:

1. Turn the ignition OFF .

Fig. Fig. 3: Voltmeter hook-up

Fig. Fig. 4: Analog voltmeter output code format

1. Set the voltmeter on a DC voltage range to read from 0-20 volts.
2. On all EEC-IV vehicles, connect the voltmeter from the battery positive post to the Self-Test Output (STO) pin of the large Self-Test connector. On all other vehicles, connect the positive voltmeter lead to the EEC STO line and the negative lead to engine ground, then jumper the EEC Self-Test Input (STI) to ground.

USING THE MALFUNCTION INDICATOR LIGHT (MIL) During the Self-Test,a service code is reported by the malfunction indicator light. It will represent itself as a flash on the CHECK ENGINE or SERVICE ENGINE SOON light on the dash panel. A single digit number of 3 will be reported by 3 flashes. However, a service code is represented by a 2-digit or 3-digit number, such as 23. As a result, the Self-Test service code of 23 will appear on the MIL light as 2 flashes, then, after a 2 second pause, the light will flash 3 times.

Barring any vacuum leaks, P0401 is indicative of a bad EGR valve. Hope this answers your question. Best of luck.
Greg

yes about the upper intake and the only way i know how to check the coils is with a engine anilyser or if the check engine light comes on then you can have the codes pulled and that will tell you which cylender is missfiring this engine has a indevidual coil for each spark plug so thares 6 of them and thay slide right down over the sparkplugs