Fail safe mode alarm cause car dint move

if you have a visible chip on the key (resistor), the car may not be able to read the signal and go into fail safe mode.

Also try to unlock the car from the drivers door to see if there is an alarm issue. The disarm wire is attached to the key lock cylinder in the drivers door.

It may run fine but it's in fail safe mode
DTC P0351-P0354
DTCs P0351 through P0354 Ignition Coil Primary/Secondary Feedback Circuit diagnostic monitors the primary circuitry of individual ignition coils for the successful completion of an ignition event. The ignition trigger signal and ignition fail-safe input signal provide crucial information in the control of ignition system timing and the activation of the fail-safe function. Based on the initial timing angle, calculated from the crankshaft and the camshaft position signals, the powertrain control module (PCM) calculates the ignition trigger signal. The ignition trigger signal is then sent to the ignition control circuitry located in each ignition coil. The ignition control circuitry initiates the ignition dwell period by commanding the power transistor ON. When the PCM determines the proper time to provide spark, the PCM turns OFF the ignition trigger signal. In response to the PCM signal, the ignition coil control circuitry turns OFF the power transistor, producing a high voltage discharge from the secondary coil windings. After the spark has occurred, the control circuitry sends an ignition fail-safe input signal back to the PCM, confirming that an ignition event has taken place. If the ignition fail-safe input signal is not received by the PCM, a cylinder specific DTC will set.
Anytime the fail-safe input signal is lost, engine operation will enter the fail-safe function. If engine load exceeds certain parameters during the fail-safe function, Fuel Cut-off mode is activated and fuel injector operation is ceased. The suspension of fuel injection in the Fuel Cut-off mode protects the catalytic converter from damage. Damage can occur when excess unburned fuel reaches the converter and causes the catalyst to overheat.

Diagnostic Aids
• Check for the following conditions:
- An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 will set if there is a fault in any of the ignition coil circuits.
- If DTCs P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
- Inspect the ignition coil grounds at G 105 for a clean and tight connection.
- The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
- If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
- Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.
- Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
• An intermittent malfunction may be caused by a fault in the ignition coil electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .
• Repair any electrical circuit faults that were found. Refer to Wiring Repairs .
• The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.

Sounds like you have a failiing transmission, faulty selector, or possibly a failing Transmission ECU. There are too many possible causes to even guess, but what I can tell you that 'limp mode' will not prevent your vehicle from Driving - It will, however, enable a vehicle with certain failing systems to be driven short distances at limited speeds (with decreased power), but it does not prevent the vehicle from moving - If your vehicle starts but does not move when placed in gear, the problem is not 'limp mode' but lies elsewhere.

Alot of vehicles have what is called an interlock or reverse park switch usely on the side of the transmission tells the computer what gear or mode trany is in electrical signal
It moves everytime you move the lever so it is a ware part on automatics .
You didn't say what vehicle or transmission you have but it sounds like this switch,I've seen it before

Check in its repair manual.

Mai

It could be the vacuum modulator on your auto transmission, sometimes when vacuum hoses fail,split or whatever, they can suck up impurities causing other downstream items to fail. Also check mechanical linkage form shifter in cabin to transmission gear selector arm. If jumps were happening these might have worked loose. Best of luck!

This just happened to me. I drove the beetle in the snow and slid up to a stop sign. The slide engaged the anti-lock brakes. After that, the car was sluggish starting out and would not shift into 4th gear.
Turns out, the transmission was stuck in 3rd gear. If you can believe it, this is by design! It's a fail safe mode that gets triggered by the wheels spinning out of sync.
According to my mechanic there are wheel speed sensors on each wheel. If the computer senses the wheels moving at different speeds it will drop into fail safe mode. This requires a special scan tool to clear the codes.
Once the codes were cleared, ran like new.

This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear.

Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmission is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the under hood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.

No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter : ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Car goes into gear but feels very sluggish like the brakes are dragging, but it will roll easily (starts out in 4th gear), you manually shift to 2 to get it moving, once it's moving you put it back in OD and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

1. the automatic transmission for bmw 328i 1997 move to front to rear

fail safe mode should give you third and reverse

fault in the TCU or a soleniod failure