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 6 MazdaspeedFACTORY OEM SERVICE PROCEDURE

DTC P2122: Notes

DTC P2122 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2122

Accelerator pedal position (APP) sensor No. circuit low input

DETECTION CONDITION

The PCM monitors the APS No. signal. If the PCM detects that the APP sensor No. voltage is below 0.2 V , the PCM determines that the APP sensor No. circuit has a malfunction.

Diagnostic support note

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

POSSIBLE CAUSE

APP sensor malfunction
Connector or terminal malfunction
Open circuit between APP sensor terminal F and PCM terminal 3D
Short to ground circuit between APP sensor terminal F and PCM terminal 3D
Open circuit between APP sensor terminal D and PCM terminal 3G

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.