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.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 188 (ANTI-THEFT SYSTEM -- PATS)DIAGNOSIS AND TESTINGPASSIVE ANTI-THEFT SYSTEM (PATS) - DIAGNOSTIC TROUBLE CODES (DTC) INDEXPOWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX
2009 Mercury Milan Premier, 3.0 1, AWD
Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index
2009 Mercury Milan Premier, 3.0 1, AWDSECTION Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
DTC INDEX REFERENCE
| DTC | Description | Source | Action |
|---|---|---|---|
| B1213 | Anti-Theft Number of Programmed Keys Is Below Minimum | PCM | GO to PINPOINT TEST F . |
| B1342 | ECU Defective (EEPROM in PCM not working) | PCM | INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . |
| B1600 | PATS Ignition Key Transponder Signal Is Not Received | PCM | GO to PINPOINT TEST B . |
| B1601 | PATS Received Incorrect Key-Code From Ignition Key Transponder | PCM | GO to PINPOINT TEST C . |
| B1602 | PATS Received Invalid Format of Key-Code From Ignition Key Transponder | PCM | GO to PINPOINT TEST D . |
| B1681 | PATS Transceiver Module Signal Is Not Received | PCM | GO to PINPOINT TEST E . |
| B2103 | Antenna Not Connected | PCM | GO to PINPOINT TEST A . |
| B2431 | Key Program Failure (Defective Key or Transceiver) | PCM | VERIFY if the correct PATS key is being used. If the PATS key is defective, USE a new key for programming. |
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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.