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.
2004 Mazda B4000 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Security & Lock DTCS
SECURITY & LOCK DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| B1213 | ANTI-THEFT NUMBER OF PROGRAMMED ENCLOSED IGNITION KEYS BELOW MINIMUM |
| B1600 | NO KEY CODE RECEIVED-DAMAGED ENCODED IGNITION KEY OR USE OF NON PATS KEY |
| B1601 | UNPROGRAMMED ENCODED IGNITION KEY (KEY CODE FORMAT OK) |
| B1602 | INVALID KEY CODE FORMAT FROM ENCODED IGNITION KEY TRANSPONDER (PARTIAL KEY READ) |
| B1681 | PATS TRANSCEIVER SIGNAL IS NOT RECEIVED (NOT CONNECTED, DAMAGED, OR WIRING) |
| B2103 | ANTENNA NOT CONNECTED-DEFECTIVE TRANSCEIVER |
| B2139 | PCM ID DOES NOT MATCH BETWEEN PATS AND PCM |
| B2141 | NO SECURITY ID EXCHANGE BETWEEN PATS AND PCM |
| U1147 | FAULTY SCP LINK OR INCORRECT PCM CALIBRATION |
Factory Service Tools
Use the Manual With the Right Hardware
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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.