Mazda RX-8 Workshop Manual page 456

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2011 - RX-8 - Engine
DTC P2138 [13B-MSP]
DTC P2138 APP sensor No.1/No.2 voltage correlation problem
DETECTION
CONDITION
POSSIBLE
CAUSE
Diagnostic procedure
STEP
VERIFY FREEZE FRAME DATA (MODE 12) HAS
1
BEEN RECORDED
Has the FREEZE FRAME DATA
(Mode 12) been recorded?
The PCM compares the input voltage from APP sensor No.1 with the input
voltage from APP sensor No.2 when the engine is running. If the difference
is more than the specification, the PCM determines that there is a APP
sensor No.1/No.2 voltage correlation problem.
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.
FREEZE FRAME DATA (Mode 2/Mode 12) is available.
The DTC is stored in the PCM memory.
APP sensor connector or terminals malfunction
PCM connector or terminals malfunction
APP sensor No.1 malfunction
APP sensor No.2 malfunction
PCM malfunction
INSPECTION
YesGo to the next step.
No Record the FREEZE FRAME DATA (Mode 12)
on the repair order, then go to the next step.
ACTION