Question about 1995 Buick LeSabre

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Code p0629 pass key frequency invalid - 1995 Buick LeSabre

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I don't have info on that code, so it may be specific to Buick. The passkey uses a chip which the computer in the car "reads" to make sure the owner is trying to start the car.
The ignition lock has a sensor that picks up the chip in the key. I would try a spare key first to make sure the problem is not the key. It could also be a problem with the lock cylinder or the module that stores the code.

Posted on Dec 12, 2012


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Posted on Jan 02, 2017


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2000 oldsmobile silhouette has error P1626 Theft Deterrent Fuel Enable Signal Lost. Now sputters at 4k rpm and a occasion backfires through throttle body.. Please help

Your best bet is to take your vehicle to a repair shop that has diagnostic tools an know how to fix this problem . There is also a DTC in the BCM . DTC B2960 Invalid Coded Key Present

The vehicle VTD functions are provided by the Pass Key?® III system. Pass Key?® III consists of an ignition key with a transponder embedded in the head, the theft deterrent controller module, the exciter assembly, and the PCM.
The exciter assembly is an antenna which is made up of wire coils which surround the ignition lock cylinder. These coils, powered by the theft deterrent controller module, emit electromagnetic energy which energizes the transponder pellet within the head of the key. The energized transponder transmits a unique value by radio frequency which is detected by the exciter. The theft deterrent controller module receives and compares this value to one stored in memory (a learned value). If the received transponder value matches a learned value, the theft deterrent controller module sends a password via the class 2 serial data line to the PCM. The PCM compares this password to one stored in memory (a learned password). If the passwords match the PCM enables engine starting.

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Air Bag Code, Symptom 71, Passenger Presence System Invalid Serial Data. System is not getting reading from pass side seat occupant detection sensor. May be able to calibrate

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P1685 is:

Skim Invalid Key

The engine controller has received an invalid key from the SKIM.

You can get a full list of error codes from:

Jun 21, 2011 | 1997 Jeep Grand Cherokee

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1997 breeze is shooting codes 12 46 43 55

OBD Code 12 - No Distributor Reference Pulse (Diagnostic Test Active) The Engine Control Module-ECM uses the distributor reference pulse to calculate the engine speed. On newer engines, the Crank Shaft Position Sensor performs this function.

  • When flashing the Check Engine Light to read codes, code 12 will always display first, indicating the diagnostic system is active
  • The engine will not run with a "hard" code 12 set
Common Problems:
  • Chances are you will never need to diagnose a code 12. Rather, the problem would be a crank, no-start condition.
  • If code 12 does not flash, that would indicate a communication problem with the ECM.
  • Code 12 does not show when reading codes with a scan tool. If there is a communication problem, the scan tool will let you know.

OBD Code 46 - Pass-Key II System Error - Circuit out of Frequency Range The ECM receives a signal from the Pass-Key module. When the correct signal is received, the ECM will allow the engine to start and run. Please review the RepairPal article on the GM Pass-Key Anti-theft systems for more information.

  • Engine may not start
Common Problems:
  • Faulty ignition lock cylinder

OBD Code 43 - Knock Sensor error The ECM receives a signal from the Knock Sensor based on the amount of engine ping detected. The ECM uses information from this sensor to help calculate fuel delivery and spark timing.

  • Engine ping
  • Lack of power
Common Problems:
  • Faulty Knock sensor
  • Poor connection at Knock sensor

OBD Code 55 - End Test.

Hope ehit help (remember comment and rated this).

Jul 22, 2010 | 1997 Plymouth Breeze

1 Answer

The security light is blinking and when you try to start it there is nothing, new battery,starter, it simply is not getting power to start it..It seems like it is a security lock out.. dont know where to...

Normally, you would insert the key in the drivers door, turn left, then right to disarm and reset it. If yours is malfunctioning, you can disable it for good by doing the following:

light green with a negative polarity at the harness coming out of the door in the driver's side kick panel.

Once Located, splice into this wire with a similar guage wire, and put it to a solid chassis ground. This terminates the OEM alarm functions entirely.


Bulb Stays Illuminated and Engine Does Not Start. If the "SECURITY" indicator stays illuminated while and after attempting to start the engine and the engine does not crank or start, this indicates that the PASS-Key II module has sensed an improper key value and has disabled the engine and set the disable timer. This specifically does not mean that the key sense circuit is open or shorted to chassis ground, refer to "Bulb Flashes and Engine Does Not Start." Remove the key from the ignition and verify that is the correct key code for the vehicle. The key code may be checked using J 35628-A and comparing the key code to that of other keys for the vehicle. After waiting approximately 3 minutes for the disable time to expire and the "SECURITY" indicator to go out, try to start the engine with a known good key with the proper key code.

Bulb Flashes and Engine Does Not Start. If the "SECURITY" indicator flashes once per second and the engine does not start, this indicates that the PASS-Key II module sensed an open, a short or otherwise invalid (value matched none of the available 15 key codes) input from the ignition key resistor input. The PASS-Key II module does not start the disable timer during this operation mode. This operation mode could also be caused by a malfunctioning power or ground circuits.


There is 2 more ways to fix the problem:

1) replace key cylinder (very difficult)

2) look for 2 small white wires encased in an orange cover at the bottom of the steering column at the big steering column connector. Cut the two small white wires and connect a resistor of the same resistance of your key chip onto the two white wires leading into the connector. Problem solved!

Feb 12, 2010 | 1997 Buick LeSabre

1 Answer

2000 neon check engine light is on

P1685 Skim Invalid Key.

The Sentry Key Immobilizer Module contains a Radio Frequency (RF) transceiver and a microprocessor. The SKIM transmits RF signals to, and receives RF signals from the Sentry Key transponder through a tuned antenna ring integral to the SKIM housing. When the ignition switch is turned to the On position, the SKIM transmits an RF signal to the transponder in the ignition key. The SKIM then waits for an RF signal response from the transponder. If the response received identifies the key as valid, the SKIM sends a valid key message to the PCM over the PCI data bus. If the response received identifies the key as invalid, or if no response is received from the key transponder, the SKIM sends an invalid key message to the PCM. The PCM will enable or disable engine operation based upon the status of the SKIM messages.

you can look it up here:

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Dose anyone no wat thease codes codes meen as my car wont start but turning the key on an of a few times it brings up thease codes p1130 and p1685

P1130 - HO2S Circuit Low Variance Bank 1 Sensor 1

P1685 - Skim Invalid Key - The engine controller has received an invalid key from the SKIM.

CLICK HERE for a full list of OBD Codes for the PT Cruiser.

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Engine stalls after a few seconds..'99 Venture

Does the security light flash or come on steady ? Have a lot of thing's on your key ring ? Other key's with transponder inside , Do you know what a transponder is ?

The Ignition Key (Transponder)
The ignition key for PASS-Key® III equipped vehicles is a typical ignition key using a transponder pellet located in the end of the key. The ignition key transponder value is used in order to determine if a valid ignition key is being used in order to start the vehicle. When the ignition key is inserted into the ignition cylinder and the PASS-Key® III module detects the ignition voltage (the ignition switch is in RUN or START) the module measures the transponder pellet value. The PASS-Key® III module validates this value and performs the following functions:
• If the ignition key transponder value is valid, the PASS-Key® III module performs the following (system enable) functions:
- The PASS-Key® III module sends a pulse width modulated signal to the PCM to request fuel enable.
- The PCM enables the fuel system.
- This function enables the engine to start.
• If the ignition key transponder value is invalid, the PASS-Key® performs the following (system disable) functions:
- The PASS-Key® III module does not send the fuel request signal to the PCM.
- The PCM does not enable the fuel system.
- This function does not enable the engine to start and run. The engine may start and then stall due to residual fuel in the fuel system.
The PASS-Key® III module can identify up to 10 valid key codes to operate the vehicle.

Having excess thing's on you ring , including other PASS-Key® III keys , can confuse the computers .

Mar 08, 2017 | 1999 Chevrolet Venture

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