After changing steering column and components and performing a 30-minute relearn procedure car now starts and dies 09 chvy cobalt

There is a transponder chip in the key that sends a signal to a receiver in the steering column. That talks to the ECM and releases power to the ignigition system. Try the Security Relearn procedure.

https://www.google.com/search?q=1995+chevy+p-30+security+reset

..

Programming Theft Deterrent System Components
Important: When replacing a body control module (BCM) with an GM Service Parts Operation (SPO) Replacement Part, set up the replacement BCM prior to the 10-minute relearn procedure or the 30-minute relearn procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
Important:
• When replacing a BCM with an GM SPO Replacement Part, the module will learn the keys immediately. The existing powertrain control module (PCM) must learn the new fuel continue password when you replace the BCM.
• When replacing a PCM with a GM SPO Replacement Part, the new PCM will learn the incoming fuel enable password immediately after programming and upon receipt of a password message. A PCM which had been installed in another vehicle would have learned the fuel enable password of the other vehicle's BCM. Perform either the 10-minute relearn procedure or the 30-minute relearn procedure to learn the fuel enable password of the current vehicle's BCM.
• When performing either relearn procedure, all previously learned keys will be erased from the BCM memory.
• Additional keys may be learned. Refer to Adding Keys .
Tools Required
• Scan tool
• Techline Terminal with current Service Programing System (SPS) software
10-Minute Relearn Procedure
Use this procedure after replacing the following components:
• The passkey III (PK3) keys
• The BCM
• The PCM, see Important above
Important: If replacing a BCM with a GM SPO Replacement Part, perform the procedure to setup a new BCM prior to the 10-minute relearn procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
Connect a scan tool to the vehicle.
Turn ON the ignition, with the engine OFF.
Insure that all power consuming devices are turned OFF on the vehicle.
With a scan tool, select Request Info. under Service Programming System and follow the scan tool on-screen instructions.
Disconnect the scan tool from the vehicle and connect the scan tool to a Techline Terminal with the current Service Programming System (SPS) software.
On the Techline Terminal, select Service Programming System and follow the Techline Terminal on-screen instructions.
Disconnect the scan tool from the Techline Terminal and re-connect the scan tool to the vehicle.
With a master passkey III key, turn ON the ignition with the engine OFF.
With a scan tool, select Program ECU under Service Programming System.
At this point the scan tool must remain connected for the duration of the 10-minute relearn procedure.
Observe the scan tool, after approximately 10 minutes the scan tool will display "Programming Successful, Turn OFF Ignition". The vehicle is now ready to relearn the key information and/or the passwords on the next ignition switch transition from OFF to ON.
Turn OFF the ignition and wait 5 seconds.
With a master Passkey III key, start the vehicle. The BCM has now learned the key transponder information and the PCM has now learned the fuel continue password.
Important: Perform this step ONLY on vehicles with EXPORT configured BCM's.
Turn OFF the ignition and wait 15 seconds minimum.
Important: Perform this step ONLY on vehicles with EXPORT configured BCM's.
With a second master passkey III key, start the vehicle. The BCM has now learned the second master Passkey III key transponder information
With a scan tool, clear any DTCs.
30-Minute Relearn Procedure
Use this procedure after replacing the following components:
• The passkey III (PK3) keys
• The BCM
• The PCM, see important above
Important: This procedure is not available on vehicles equipped with option code (Z49).
If replacing a BCM with an GM SPO Replacement Part, perform the procedure to setup a new BCM prior to the 30-minute relearn procedure.
With a master passkey III key, turn ON the ignition, with the engine OFF.
Observe the STARTING DISABLED DUE TO THEFT message on the drivers information center (DIC), after approximately 10 minutes the STARTING DISABLED DUE TO THEFT message on the DIC will turn off.
Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
Important: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
With a master passkey III key, start the vehicle. The vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password.

When the correct number of learned master keys are not available to perform adding keys procedure the 10 minute re-learn procedure or 30 minute re-learn procedure must be performed. Refer to Programming Theft Deterrent System Components .
30-Minute Relearn Procedure
Use this procedure after replacing any of the following components:
?€¢
The PASS-Key III plus keys

?€¢
The theft deterrent module (TDM)

?€¢
The powertrain control module (PCM)

Important:
?€¢
This procedure is not available on vehicles equipped with EXPORT configured TDMs.

?€¢
When performing the 30-minute relearn procedure, all previously learned keys will be erased from the TDM memory. Additional keys may be learned after performing the relearn procedure.

?€¢
When replacing a TDM with a GM SPO Replacement Part, ensure the procedure to setup a new TDM is performed prior to the 30-Minute Relearn Procedure.

1. With a master vehicle key, turn ON the ignition, with the engine OFF.
2. Observe the security indicator. After approximately 10 minutes, the telltale will turn OFF.
3. Turn OFF the ignition, and wait 5 seconds.
4. Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
Important: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to RUN. You must turn the ignition OFF before attempting to start the vehicle.

5. With a master vehicle key, start the vehicle. The vehicle has now learned the key transponder information and/or the ECM has now learned the fuel continue password.
6. If additional keys are required to be learned, refer to Adding Keys .
7. With a scan tool, clear any DTCs.

Adding Keys
Important:
?€¢
To initiate, this procedure requires that a learned master key be available.

?€¢
A total of 10 master keys or valet keys may be programmed to a single vehicle.

?€¢
This procedure adds keys only. The procedure does not erase previously learned keys.

?€¢
The keys to be learned must duplicate the mechanical cut of the current key.

?€¢
If more than one valet key is to be learned, immediately precede each valet key with a learned master key.

1. With a previously learned master key, turn ON the ignition, with the engine OFF.
2. Turn OFF the ignition and remove the key.
3. Within 10 seconds insert the key to be learned. Turn ON the ignition with the engine OFF. The vehicle has now learned the new key.

Relearn for what ? Anti theft system PK3 ? The relearn procedure is three 10 min. procedures for a total of 30 min.
30-Minute Relearn Procedure
Use this procedure after replacing the following components:
?€¢
The passkey III (PK3) keys

?€¢
The BCM

?€¢
The PCM, see important above

Important: This procedure is not available on vehicles equipped with option code (Z49).
If replacing a BCM with an GM SPO Replacement Part, perform the procedure to setup a new BCM prior to the 30-minute relearn procedure.

1. With a master passkey III key, turn ON the ignition, with the engine OFF.
2. Observe the STARTING DISABLED DUE TO THEFT message on the drivers information center (DIC), after approximately 10 minutes the STARTING DISABLED DUE TO THEFT message on the DIC will turn off.
3. Turn OFF the ignition, and wait 5 seconds.
4. Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
Important: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

5. With a master passkey III key, start the vehicle. The vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password.
6. With a scan tool, clear any DTCs.

Your doing it wrong !
30-Minute Relearn Procedure
Use this procedure after replacing the following components:
?€¢
The passkey III (PK3) keys

?€¢
The BCM

?€¢
The PCM, see important above

Important: This procedure is not available on vehicles equipped with option code (Z49).
If replacing a BCM with an GM SPO Replacement Part, perform the procedure to setup a new BCM prior to the 30-minute relearn procedure.

1. With a master passkey III key, turn ON the ignition, with the engine OFF.
2. Observe the STARTING DISABLED DUE TO THEFT message on the drivers information center (DIC), after approximately 10 minutes the STARTING DISABLED DUE TO THEFT message on the DIC will turn off.
3. Turn OFF the ignition, and wait 5 seconds.
4. Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
Important: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

5. With a master passkey III key, start the vehicle. The vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password.
6. With a scan tool, clear any DTCs.

I'm assuming the engine cranks over with the starter, seems to start for a second or two then dies.

Does the message centre have a flashing "SECURITY" message?

If so, you have a Passlock II problem.

To get it running you'll have to do the 10 minute relearn procedure, or if that fails the 30 minute relearn procedure. I could post both procedures if you like.

To fix it so it will never fail again you will have to:
1) bypass the sensor in the steering column, or ,
2) hardwire (solder) the 3 wires to the sensor, or ,
3) replace the sensor.
This last option rarely works due to the problem being in the connector contacts, therefore my preferred method is either option 1 or 2. (I really wish GM would fix the contact issue by using gold flashed contacts and not crummy tin plated ones which tarnish over time)

I'm assuming the engine cranks over with the starter, seems to start for a second or two then dies.

Does the message centre have a flashing "SECURITY" message?

If so, you have a Passlock II problem.

To get it running you'll have to do the 10 minute relearn procedure, or if that fails the 30 minute relearn procedure. I could post both procedures if you like.

To fix it so it will never fail again you will have to:
1) bypass the sensor in the steering column, or ,
2) hardwire (solder) the 3 wires to the sensor, or ,
3) replace the sensor.
This last option rarely works due to the problem being in the connector contacts, therefore my preferred method is either option 1 or 2. (I really wish GM would fix the contact issue by using gold flashed contacts and not crummy tin plated ones which tarnish over time)

try reading the FSM? yet

or at alldata.com for 15 bucks?

it all there, every day ,all the time. no need to wonder.

or join jeep forum.?

it unscrews,

and screws back on.

but the real question is, is it needing calibration. during or after.

replacing it is childs play, youtube that, bingo?

did you do all 25 test in the FSM, yet, on iRMC

even making sure the flapper is not jammed??????

if yes, and the actuator is really bad,

read this in the last page .



If the Manifold Flow Valve is replaced, a non volatile memory reset must be performed to learn the new port flap adaptive values.



now more lil\'horrors.. see what happens if you jerk the battery

quote

Vehicles equipped with engine and transmission computers may require a relearn procedure after the vehicle battery has been disconnected. Most vehicle computers memorize and store vehicle operational patterns. When the battery is disconnected, the information may be cleared. If the information is cleared, the computer will go into default mode in order to operate the vehicle. The vehicle computer will relearn operational patterns each time the vehicle is restarted. The relearning process may take up to 40 or more key cycles.

When a specific engine component is replaced, a relearn procedure may be required. If the relearn procedure is not performed, the vehicle may exhibit the following:

• Harsh or poor shift quality



• Poor fuel mileage



• Hesitation or stumble



• Unstable idle or stalling



• Lean or rich running conditions

If an accessory component was replaced, a relearn procedure may also be required. The following systems and components may not work properly without a relearn procedure:

• Anti-theft system



• Steering system



• Power window system



• Power sunroof system

It is important to reset any Diagnostic Trouble Codes (DTC\'s) before performing the relearn procedure. Most relearn procedures can be performed with the use of an OBD-2 scan tool.






NOTE




This reconnection procedure is to be performed anytime the battery has been disconnected.

1. Connect the battery negative cable to the battery post and tighten the clamp nut to 45 inch lbs. (5 Nm).



2. If the vehicle is equipped with Electronic Stability Program (ESP), once the battery is reconnected, the Steering Angle Sensor (SAS) in the clockspring needs to be calibrated.
   
   
   
   
   NOTE
   
   
   
   
   The SAS requires calibration anytime the battery or an ABS (ESP) component has been disconnected for any length of time. If the SAS is not calibrated following battery reconnection, the ESP/SAS indicator lamp is illuminated following 5 ignition cycles indicating the need for calibration.
   
   
   
   
   



3. To calibrate, perform the following:



4. Start the engine.



5. Center the steering wheel.



6. Turn the steering wheel all the way to the left until the internal stop in the steering gear is met.



7. Turn the wheel all the way to the right until the opposite internal stop in the steering gear is met.



8. Center the steering wheel.



9. Turn off the engine.

SIGH !

unplug the battery for ten mins then move the fuel injectors a smidge plug the battery back in and you should be good just let in run for awhile afther you start it this resests the fuel flow to the injectors but don't ever jump start any one or you will have the same problem and have to do it all over again

Good day;
The following is the removal of the switch
1. remove the steering column trim covers.
2. disconnect the ignition switch harness connector.
3. turn the switch to the run position

IMPORTANT THE IGNITION SWITCH MUST BE IN THE RUN POSITION DURING REMOVAL IN ORDER TO AVOID DAMAGE TO THE IGNITION SWITCH.

4. remove the switch screws
5. remove the ignition switch from the steering column

if the ignition switch is replaced and a learn procedure is not performed the engine will crank but not start or will start and stall immediately.

30 minute learn procedure
1. turn ON the ignition with the engine OFF
2. attempt to start the engine then release the key to ON. the vehicle will not start
3. observe the SECURITY telltale. after approx 10 min the telltale will turn OFF
4. turn OFF the ignition and wait 5 seconds
5 repeat steps 1-4 two more times for a total of 3 cycles (30 min) the vehicle is now ready to relearn the PASSLOCK sensor data code and or passwords on the next ignition switch transition from OFF to CRANK.

IMPORTANT: THE VEHICLE LEARNS THE PASSLOCK SENSOR DATA CODE AND OR PASSWORD ON THE NEXT IGNITION SWITCH TRANSITION FROM OFF TO CRANK YOU MUST TURN THE IGNITION OFF BEFORE ATTEMPTING TO START THE VEHICLE.

6.start the vehicle the vehicle has now learned the passlock and or password
7. if you have a scan tool clear any codes if needed or disconnect the battery for 30 sec. the history DTC will self clear after 100 ignition cycles.

hope this helps

Cheers