Mazda RX-8 Manual page 804

DTC P0507
DTC P0507 Idle air control system RPM higher than expected
DETECTION
CONDITION
POSSIBLE
CAUSE
The PCM compares the actual idle speed with the target idle speed when the engine
•
is running. If the actual idle speed is higher than targeted by 200 rpm , the PCM
determines that the idle air control system RPM is higher than expected.
Diagnostic support note
This is a continuous monitor (CCM).
•
The MIL illuminates if the PCM detects the above malfunction condition in two
•
consecutive drive cycles or in one drive cycle while the DTC for the same
malfunction has been stored in the PCM.
PENDING CODE is available 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.
•
Vacuum hoses improper connection
•
Drive-by-wire control system malfunction
•
IAT sensor malfunction
•
ECT sensor malfunction
•
APP sensor malfunction
•
Eccentric shaft position sensor malfunction
•
PCM malfunction
•
(w) Engine Diagnostics & Control
Page 241