Possibly the computer module is what the garage told me

Ive had simularr issues with my 97 I first replaced the ignition switch on the steering column and cleaned the fuses in the drivers side of the dash by the door, then eventually it came back and I replaced the body control module. Turns out the fuses and ignition switch power up the Body control module which controlls the inside cab options. However the bcm had to be programmed by the dealer i bought it from that cost an extra $100 it was $200 to begin with. Ive been told by a dealer mechanic I could have programmed it myself
by installing it and turning the key forward for 2 min then off for 2 min. then start the car, this burns the key chip code into your new body control module form your existing Engine Control Module. Make sure this is the same procedure for your 99 before attempting. The BCM is behind the pass side under dash panel and the glove box. Also check the battery connections to make sure they are clean and tight.

If the key had gone faulty, the key code must be re programmed on the vehicle computer. This can be done only using a PIWIS tool, available at the dealer or at a qualified Porche garage.
Try also the following reset:
turn ignition on,
turn off.
remove the transponder from the column
push any button on the fob within 6 seconds.
This procedure will reset the key synchronizing again with the vehicle computer.

In regards to the 1614 code. You should/could also see code 1610.

P1610/P1614
P1610- Ignition key/engine control module (ECM) malfunction
P1614- Immobilizer control module (ATS) coding plug communication-no signal. (ATS=anti theft system)
The ECM is getting a signal form 1614 that the key/ignition is not providing a correct code. Hence, the programing is told to fail engine start. Should the engine failing to start with 1 key, try the other key.
Should the Anti Theft System go into lock mode with one key, try the second key. If that does not unlock it then do this: with either key turn the ignition to ON position for 5 seconds then BACK to OFF position for 5 seconds, the to On position for 5 seconds then back to the OFF position for 5 seconds. If the ignition key is and intergrated key (remote: unlock, lock) the batteries should be changed in both keys. Low battery or dead battery provides low or no security code signals to ECM -- hence incorrect or no signal.
When replacing the batteries: be sitting in the drivers seat with the 2 keys within 24 inches of each other. And make the battery change within 1 minute for each key and within 4 minutes of the first key.
If that does not work,Check you users manual for the ignition key sequence on/off series to relearn the on board car computer to the keys.

try another key. the key could be worn where read coil in the ignition switch lock cylinder and immobilizer control module and ecm dont recognize ignition key or ignition switch key lock cylinder failing.

try this install the new key in the ignition switch. turn on the ignition switch to the on position for 10 minutes.when the system led lock light disappear.turn off the ignition switch for 5 seconds.then start the engine.still dont start.try this procedure few more times.if car still dont crank and you see the pad lock symbols.the dealership will have to reprogram the new key and body control module.

You are going to need to replace the ignition switch

Dear sir, I am glad to share the experience. I had the same problem. At first I also thought it was the key that was faulty, I Went and bought new batteries, but it never worked. When a specialist checked, we found that the ignition system is the one that was faulty. When we replaced it (USD500.0), the problem was resolved.
The only complication is that when you change the ignition system, the key and the steering lock which is always a set has to be replaced, the key need to be programmed with the computer in the car so that it works. So I wish you the best. Julius ouma, Kampala, Uganda. Julius.ouma@ gmail.com

SOUNDS LIKE THEY MAY HAVE DISCONNECTED THE ALTERNATOR OR PULLED THE CONNECTOR LOOSE WHILE DOING THE CLUTCH.

could be, i think i replaced every thing else in the car, so why not give that a go

what year?

here's 1990. It may be the instrument cluster that's the issue.
You never said what the prnlem is.
Did you reporgram the keys to the new module?

Please rate as fixe
Anti-Theft —PATS The passive anti-theft system (PATS) contains the following components:

• theft indicator
• encoded ignition key
• transceiver module
• instrument cluster
• powertrain control module (PCM)
• standard corporate protocol (SCP) communication network

The PATS uses radio frequency identification technology to deter a driveaway theft. Passive means that it does not require any activity from the user. This system is known as SecuriLock® in North America, Safeguard® in the U.K. and PATS in continental Europe. This information can be found in owners literature.
The PATS uses a specially encoded ignition key. Each encoded ignition key contains a permanently installed electronic device called a transponder. Each transponder contains a unique electronic identification code, with over 72 million billion combinations.
Each encoded ignition key must be programmed into the vehicle's instrument cluster (the instrument cluster is also known as a hybrid electronic cluster [HEC]), before it can be used to start the engine. There are special diagnostic procedures outlined in the workshop manual that must be carried out if new encoded ignition keys are to be installed.
The encoded key is larger than a traditional ignition key. The key does not require batteries and should last the life of the vehicle.
The transceiver module communicates with the encoded ignition key. This module is located behind the steering column shroud and contains an antenna connected to a small electronics module. During each vehicle start sequence, the transceiver module reads the encoded ignition key identification code and sends the data to the instrument cluster.
The control functions are contained in the instrument cluster. This module carries out all of the PATS functions such as receiving the identification code from the encoded ignition key and controlling engine enable. The instrument cluster initiates the key interrogation sequence when the vehicle ignition switch is turned to RUN or START.
The PATS uses the PCM to enable or disable the engine. The instrument cluster communicates with the PCM over the SCP network in order to enable engine operation. The instrument cluster and the PCM use sophisticated messages in order to prevent a theft. The instrument cluster and the PCM share security data (when first installed together) that makes them a matched pair. After this security data sharing, these modules will not function in other vehicles. The shared PCM ID is remembered even if the battery is disconnected. The instrument cluster also stores the vehicle's key identification code even if the battery is disconnected. There are special diagnostic procedures outlined in this workshop manual that may be carried out if either a new instrument cluster or PCM needs to be installed.
All elements of PATS must be functional before the engine is allowed to start. If any of the components are not working correctly, the vehicle will not start.
PATS uses a visual theft indicator. This indicator will prove out for three seconds when the ignition switch is turned to RUN or START under normal operation. If there is a PATS problem, this indicator will either flash rapidly or glow steadily (for more than three seconds) when the ignition switch is turned to RUN or START. PATS also "blips" the theft indicator every two seconds at ignition OFF to act as a visual theft deterrent.
The PATS is not compatible with aftermarket remote start systems, which allow the vehicle to be started from outside the vehicle. These systems may reduce the vehicle security level, and also may cause no-start issues. Remote start systems must be removed before investigation of PATS-related no-start issues.
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Symptom Chart Condition Possible Sources Action

• No communication with the module — instrument cluster

• Central junction box:
  • Fuse 2 (5A).
  • Fuse 6 (5A).
  • Fuse 30 (30A).
• Circuitry.

• GO to Pinpoint Test A .

• The anti-theft indicator is always/never on — no three-second theft indicator prove-out

• Instrument cluster.
• Theft indicator.

• GO to Pinpoint Test B .

• The vehicle does not start — theft indicator proves out for three seconds as normal

• Less than two keys programmed to the system.
• Transceiver not connected/defective.
• Circuitry.
• Transceiver internal antenna damaged.
• NON-PATS key, damaged key or no code received.
• Partial key read of PATS key.
• Unprogrammed PATS key.

• PERFORM instrument cluster on-demand self-test. RETRIEVE DTCs. If DTCs are present, GO to Instrument Cluster Diagnostics Trouble Code (DTC) Index. If no DTCs are retrieved, CHECK for other possible no-start causes.

• No PCM ID stored in PATS.
• PATS/PCM ID do not match.
• Problem with SCP link.

• CLEAR the stored DTCs. CYCLE the ignition key from off to run. RETRIEVE continuous DTCs. If DTCs are present, GO to Instrument Cluster Diagnostics Trouble Code (DTC) Index. If no DTCs are retrieved, CHECK for other possible causes.

• The alarm system does not operate properly — the vehicle starts but flashes a fault code on theft indicator at key on

• Incorrect PCM calibration.

• GO to Pinpoint Test C .

--- Key Programming —Program a Key Using Two Programmed Keys NOTE: This procedure only works if two or more programmed ignition keys are available and it is desired to program additional key(s). If two keys are not available, follow the procedure in Key Programming—Erase All Key Codes and Program Two Keys .
NOTE: PID SPARE_KY must be enabled for this procedure to operate. If this Parameter Identification (PID) Index is not enabled, follow the security access procedure and select Spare Key Programming Switch: Enabled.
NOTE: If the programming procedure is successful, the new key(s) will start the vehicle and the THEFT INDICATOR will illuminate for approximately three seconds.
NOTE: If the programming procedure is not successful, the new key(s) will not start the vehicle and the THEFT INDICATOR will flash. If the programming procedure was not successful, repeat the key programming procedure from Step 1. If the failure repeats, check Circuit 729 (RD/WH) (hot at all times) in instrument cluster for proper battery voltage. Repair the circuit if voltage is not present. For additional information, refer to Diagnosis and Testing to review diagnostic trouble codes (DTCs) and perform pinpoint tests as required.
NOTE: A maximum of eight ignition keys can be programmed to a passive anti-theft system (PATS) equipped vehicle. Use PID NUMKEYS to determine how many keys are programmed to the vehicle.
NOTE: If the steps are not performed as outlined, the programming procedure will end.
NOTE: Ignition keys must have correct mechanical key cut for the vehicle and must be a PATS encoded key.

1. Insert the first programmed ignition key into the ignition lock cylinder and turn the ignition switch from OFF to RUN (maintain the ignition switch in RUN for one second).

1. Turn the ignition switch to OFF and remove the first key from the ignition lock cylinder.

1. Within five seconds of turning the ignition switch to OFF, insert the second programmed ignition key into the ignition lock cylinder and turn the ignition switch from OFF to RUN (maintain the ignition switch in RUN for one second).

1. Turn the ignition switch to OFF and remove the second key from the ignition lock cylinder.

1. Within 10 seconds of turning the ignition lock cylinder to OFF, insert the unprogrammed ignition key (new key) into the ignition lock cylinder and turn the ignition switch from OFF to RUN (maintain the ignition switch in RUN for 1 seconds