April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0108-00; Map Sensor Circuit High Input: Notes

DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0108:00	MAP sensor circuit high input
DETECTION CONDITION	The PCM monitors the input voltage from the MAP sensor. If the input voltage at the PCM terminal 1BD is above 4.89 V for 5 s, the PCM determines that the MAP sensor circuit has a malfunction. Diagnostic support note This is a continuous monitor (CCM). The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA/Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Estimates MAP using MAF sensor and engine speed. Restricts the upper limit of the engine speed. Inhibits the evaporative purge control.
POSSIBLE CAUSE	MAP sensor/IAT sensor No. 2 connector or terminals malfunction PCM connector or terminals malfunction MAP sensor malfunction Short to power supply in wiring harness between MAP sensor/IAT sensor No. 2 terminal D and PCM terminal 1BD Open circuit in wiring harness between the following terminals: MAP sensor/IAT sensor No. 2 terminal C-PCM terminal 1CM MAP sensor/IAT sensor No. 2 terminal D-PCM terminal 1BD MAP sensor/IAT sensor No. 2 terminal A-PCM terminal 1CJ PCM malfunction

CAUTION:

Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.

Related PIDs

Item (definition)	Unit/Condition	Definition	Condition/Specification (Reference)
MAP	KPa {MPA}, mBar {BAR}, psi, in H20	Manifold absolute pressure input from MAP sensor	Displays MAP
MAP_V	V	MAP sensor voltage	Ignition switched ON (engine off) (MAP:101 kPa {1.03 kgf/cm² , 14.6 psi}): Approx. 4.12 V Idle (after warm up) (MAP: 33 kPa {0.34 kgf/cm² , 4.8 psi}): Approx. 1.9 V Racing (engine speed is 2, 000 rpm) (MAP: 26 kPa {0.27 kgf/cm² , 3.8 psi}): Approx. 1.23 V