DTC P2128:00 [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSES

DTC P2128:00	APP sensor No. 2 circuit high input
DETECTION CONDITION	The PCM monitors the input voltage from APP sensor No 2 when the engine is running If the input voltage is more than 4.8 V , the PCM determines that the APP sensor No. 2 circuit has a malfunction. Diagnostic support note This is a continuous monitor (CCM) The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA is available The DTC is stored in the PCM memory.
POSSIBLE CAUSE	APP sensor connector or terminal malfunction PCM connector or terminal malfunction Short to power supply in wiring harness between APP sensor terminal B and PCM 1 AP APP sensor No 2 malfunction Open circuit in wiring harness between APP sensor terminal C and PCM terminal 1AV PCM malfunction
Courtesy of MAZDA MOTORS CORP.

DTC P2128:00

APP sensor No. 2 circuit high input

DETECTION CONDITION

The PCM monitors the input voltage from APP sensor No 2 when the engine is running If the input voltage is more than 4.8 V , the PCM determines that the APP sensor No. 2 circuit has a malfunction.

Diagnostic support note

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

POSSIBLE CAUSE

APP sensor connector or terminal malfunction
PCM connector or terminal malfunction
Short to power supply in wiring harness between APP sensor terminal B and PCM 1 AP
APP sensor No 2 malfunction
Open circuit in wiring harness between APP sensor terminal C and PCM terminal 1AV
PCM malfunction

Courtesy of MAZDA MOTORS CORP.