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This could be the problem. If your dash indicator is showing reverse but the transmission is in park it could be the safety switch. I'm not talking about the safety switch in the transmission though. In automatics they put a second switch to kill the starter from engaging. You need to adjust the linkage. If your shifter isn't actually on the column but the indicators are there is a cable that attaches the floor shift to the column and that is adjustable. Put the Floor shifter in Park and turn the column section nearest the dash by hand until you find park. Then adjust the cable length as needed. If all you have is the column shift it is still a cable adjustment. Set the emergency brake, drop the shifter to low 1 and adjust the cable linkage by loosening it on the transmission and manually move it all the way to low 1 then tighten it down then move the shifter to park and repeat teh adjustment process to verify that it is properly aligned. Lock the linkage back down and see if the vehicle will start, if it doesn't move the shifter to neutral and try to start the vehicle if the vehicle starts then check the column shift safety switch at the park position to make sure it is still in place and working. Typically, if the vehicle won't start in Park or Neutral it is more likely to be the Transmission neutral safety switch.
You need to replace and adjust your transmission range sensor switch. (also known as neutral safety switch) It is located under the air cleaner ducting on the top of the transmission under the lever where the shifter cable attaches.
It sounds like your transmission range sensor. It tells your transmission what gear your in and what gears to switch to when driving. It is reading that your not in park unless you move your shifter. You need to have it adjusted or replaced. If you want to take a look at it, it is located on the side of the transmission with a cable running to it. Just a little box like thing.
Not having more specific info as to the behavior of your vehicle it's hard to say. what the problem might be. Computer codes are only a place to startt. The P0722 is for Output Speed Sensor 2 Circuit No Signal. This means that the transmission control module is not receiving a signal from the Output Speed Sensor. I am assuming (based on this information) that your vehicle is front wheel drive and has an automatic transmission. If you have a different powertrain (i.e. quattro all wheel drive or a manual transmission), write back and let me know. This P0722 is a common fault on front wheel drive automatic transmissions (called a CVT). The bad thing is that the output speed sensors are part of the transmission control module and the only way to repair that is to replace the transmission control module. The module is located inside the transmission. Expect to pay $1000 to $1500 for the module and another $700 to $900 for labor. There is a possibility it could be the Neutral safety switch. They an get dirty and cause problems so spend a cople of dolars checking this before laying out the bigger bucks. Testing Neutral Safety Switch
Test Procedure Locate the neutral safety switch Disconnect the wiring connector at the switch Using a test light or volt-meter test for power at the wiring harness with the key in the "engine crank" or the gear shifter in the "reverse" position. (do not start the engine) If power exists reconnect the neutral safety switch and probe outgoing wires at the connector. If no outgoing power is present the switch has failed and needs to be replaced. Tip : If the engine will not crank over with the car in "park" push down the brake pedal and try cranking the engine over with the car in "neutral". What you are doing is bypassing the "park" position in the switch and now are using the little used neutral circuit. If in neutral the engine starts the switch is probably bad. Tip: Sometimes a neutral safety switch can become misadjusted. This switch adjustment can change due to normal wear of mechanism that controls switch slider. Other complications can occur if there is a loose connection somewhere in the system. While this condition is not a shorted circuit problem, it is a condition that simply breaks the flow of electricity intermittently. To troubleshoot this problem consult a car repair manual to locate the wiring schematic for your car. Repair the broken or shorted connection as needed and recheck system. Electrical problems are less complicated when the proper information is available. Hope this helps you
The neutral safety switch is located on the top and toward the base of the steering column almost to the floorboard.
To remove or install the neutral safety switch be sure to place the shifter in the neutral position, then dis-connect the wire connector at the neutral safety switch, then remove the securing screws and then remove the neutral safety switch.
Install the new neutral safety switch and do not over-tighten the securing screws, then remove the alignment pin and re-connect the wire connector to the neutral safety switch. (be sure not to remove the alignment pin until the neutral safety switch has been installed)
Check to be certain that the vehicle only starts in "Park" or "Neutral". Here is an image to help assist you, and let me know if you require any further assistance.
The park/neutral safety switch has two purposes,
1 not to let the engine start unless it is in park or neutral settings.
2 is when you manually switch gears, it tells the computer and the computer keeps the engine in check until you shift, then the computer compensates for that gear and so on.
I would check motor/ transmission mounts, drive shafts, Suspension bushings,struts, or steering linkage first.
Use like reference guide for GM Cadillac 1967-1989 Repair Guide
Neutral Safety Switch - REMOVAL & INSTALLATION
1985-89 Eldorado and Seville See Figure 1 The neutral
safety switch prevents the engine from being started in any transmission
position except Neutral or Park. The switch is located on the upper
side of the steering column under the instrument panel on column shift
cars, and inside the shift console on floor shift models.
Remove the console for access on floor shift models.
Disconnect the electrical connectors.
Remove the neutral switch.
Place 1967-70 column shift lever models in Drive, and 1971 and
later models in neutral. Locate the lever tang against the transmission
selector plate on column shift models.
Align the slot in the contact support with the hole in
the switch. Insert a
in. (2.38mm) diameter pin in place. The switch is now
aligned in Drive position.
1973 and later neutral safety switches have a shear-pin installed to
aid in proper switch alignment so that insertion of a pin is
unnecessary. Moving the shift lever from Neutral shears the pin.
Place the contact support drive slot over the drive tang. Install
the switch mounting screws.
Remove the aligning pin. Connect the electrical wiring, and
replace the console.
Set the parking brake and hold your foot on the service brake
pedal. Check to see that the engine will start only in Park or Neutral.
Fig. 1: Installation of a common neutral safety switch
See Figure 2 1974 and later cars do not have a neutral safety switch. Instead,
these cars have an interlock between the lock and the transmission
selector, which is non-adjustable.
Place the shift lever in Neutral.
Move the switch until you can insert a gauge pin,
in. (2.38mm) diameter, into the hole in the switch and
through to the alignment hole.
Loosen the switch securing screws. Remove the console first, if
Tighten the screws and remove the pin.
Step on the brake pedal and check to see that the engine will only
start in Neutral or Park.
Fig. 2: Adjustment of a common neutral safety switch
1985-89 Eldorado and Seville See Figure 3
neutral safety/back-up light switches come with a small plastic alignment pin installed. Leave this pin in place.
Place the shifter assembly in the Neutral position.
Remove the shifter lever-to-switch nut and the lever.
Disconnect the electrical connector from the neutral
safety/back-up light switch.
Remove the neutral safety/back-up light switch-to-transaxle bolts
and the switch from the vehicle.
Position the shifter shaft in the Neutral position.
If using an old switch or the plastic pin (new switch) is broken,
(2.38mm) diameter pin gauge (drill bit) into the neutral safety/back-up
light switch; the switch is then locked into its Neutral position.
Align the flats of the shifter shaft and the neutral
safety/back-up light, then, align the switch-to-tang on the transaxle.
Torque the switch-to-transaxle bolts to 22 ft. lbs. (30 Nm). Remove the
To complete installation, reverse the removal procedures. Make
sure that the engine starts only in the Park and Neutral positions.
Fig. 3: Neutral start and back-up lamp switch - 1985-89
Eldorado and Seville
Hope help with this (remember rated and comment this). Good luck.
yes there is a switch called Prndl SWITCH OR THE SAFETY NETURAL SWITCH, SINCE IT SENSES WHEN IT IS IN park Drive one drive to neutral and reverse that's where it gets the name pronounced prndl switch. IT'S located on the side of the transmission where the linkage is you take the nut off to remove linkage with the car in park, Also has two bolts that have to be removed and the harness removed. if you need more information let me know. One other thought the starter solenoid could do the same thing if the button is burnt inside the ,
the neutral safety switch is probably faulty the radio says safety because the wrong code was entered 3 time key needs to be on for 3 hours hook up battery charger check engine light may be code for trans issue