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 DIAGNOSISBODY & FRAMEDOOR LOCKSANTI-THEFT SYSTEM - PATSDIAGNOSIS AND TESTINGANTI-THEFT - PASSIVEPOWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX
2004 Ford Focus ZX3, 2.3 Z, Standard
Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index
2004 Ford Focus ZX3, 2.3 Z, StandardSECTION Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index
POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX
| DTC | Description | Source | Action |
|---|---|---|---|
| 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. |
| - | All other DTCs | REFER to MULTIFUNCTION ELECTRONIC MODULE . TEST the system for normal operation. |
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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.