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 P0112: Notes

DTC P0112 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0112

IAT circuit low input

DETECTION CONDITION

The PCM monitors IAT sensor signal at PCM terminal 15. If the PCM detected IAT sensor voltage below 0.16 V , the PCM determines that the IAT sensor circuit has a malfunction.

Diagnostic support note

This is a continuous monitor (CCM).
The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
PENDING CODE is available if the PCM detects the above malfunction condition.
FREEZE FRAME DATA is available.
DTC is stored in the PCM memory.

POSSIBLE CAUSE

IAT sensor malfunction
Short to ground circuit between MAF/IAT sensor terminal F and PCM terminal 15
Short each harness IAT signal circuit and IAT ground circuit.
Poor connection at MAF/IAT sensor or PCM connector.
PCM malfunction

Courtesy of MAZDA MOTORS CORP.

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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.