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 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

DTC P1622: Notes

DTC P1622 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P1622	Key ID number does not match
DETECTION CONDITION	ID numbers stored in immobilizer control module (IU) and PCM do not match. This DTC is indicated only after immobilizer control module is replaced and reprogramming system.
POSSIBLE CAUSE	Transformation of key ID number stored in PCM.

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.