Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2006 Mercury Montego Base, FWDFACTORY OEM SERVICE PROCEDURE
Starting System DTCS
PASSIVE ANTI-THEFT SYSTEM (PATS) - DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1213 | Anti-Theft Number Of Programmed Keys Is Below Minimum | Powertrain Control Module (PCM) | REFER to PINPOINT TEST F: DTC B1213-ANTI-THEFT NUMBER OF PROGRAMMED KEYS IS BELOW MINIMUM . |
| B1600 | Passive Anti-Theft System (PATS) Key Transponder Signal Is Not Received | PCM | REFER to PINPOINT TEST B: DTC B1600-PATS IGNITION KEY TRANSPONDER SIGNAL IS NOT RECEIVED . |
| B1601 | PATS Received Incorrect Key-Code From Ignition Key Transponder | PCM | REFER to PINPOINT TEST C: DTC B1601-PATS RECEIVED INCORRECT KEY-CODE FROM IGNITION KEY TRANSPONDER . |
| B1602 | PATS Received Invalid Format Of Key-Code From Ignition Key Transponder | PCM | REFER to PINPOINT TEST D: DTC B1602-PATS RECEIVED INVALID FORMAT OF KEY-CODE FROM IGNITION KEY TRANSPONDER . |
| B1681 | PATS Transceiver Module Signal Is Not Received | PCM | REFER to PINPOINT TEST E: DTC B1681-PATS TRANSCEIVER MODULE SIGNAL IS NOT RECEIVED . |
| B2103 | Antenna Not Connected | PCM | REFER to PINPOINT TEST A: DTC 2103-ANTENNA NOT CONNECTED . |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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