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 MANUALSFORD2004FOCUS ZX3, 2.3 Z, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXANTI-THEFT SYSTEMS DTCSANTI-THEFT SYSTEM - PATS
2004 Ford Focus ZX3, 2.3 Z, Standard
Anti-Theft System - Pats
2004 Ford Focus ZX3, 2.3 Z, StandardSECTION Anti-Theft System - Pats
ANTI-THEFT SYSTEM ( PATS) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1213 | Anti-theft number of programmed encoded ignition keys below minimum | PCM | Program additional keys. For additional information, refer to KEY PROGRAMMING USING TWO PROGRAMMED KEYS . TEST the system for normal operation. |
| B2103 | Antenna not connected | PCM | Go To PINPOINT TEST A: DTC B2103 ANTENNA NOT CONNECTED . |
| B1600 | No key code received | PCM | Go To PINPOINT TEST B: DTC B1600 NO KEY CODE RECEIVED . |
| B1601 | Incorrect key code received | PCM | Go To PINPOINT TEST C: DTC B1601 INCORRECT KEY CODE RECEIVED . |
| B1602 | Invalid key code format from encoded ignition key transponder | PCM | Go To PINPOINT TEST D: DTC B1602 INVALID KEY CODE FORMAT FROM ENCODED IGNITION KEY TRANSPONDER . |
| B1681 | PATS transceiver signal is not received | PCM | Go To PINPOINT TEST E: DTC B1681 PATS TRANSCEIVER SIGNAL IS NOT RECEIVED . |
| B2431 | Transponder programming failure | PCM | Program an additional key. For additional information, refer to KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT . TEST the system for normal operation. |
| B1342 | PCM is defective | PCM | INSTALL a new PCM REFER to POWERTRAIN CONTROL MODULE (PCM) . CLEAR the DTCs. REPEAT the self-test. |
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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.