DTC P24B8

DTC P24B8: Evaporative Emission (EVAP) Leak Check Module Absolute Pressure Sensor Out of Range

General Description

Courtesy of HONDA, U.S.A., INC.

The evaporative emission (EVAP) leak check module pressure sensor is a sensor used for leak detection of the fuel tank. The limit of the EVAP leak check module pressure sensor output is specified. If the output exceeds that limit, the powertrain control module (PCM) detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	6 seconds or more
DTC Type	Two drive cycles, MIL on

Enable Conditions

Condition
Vehicle	ON mode

Malfunction Threshold

The EVAP leak check module pressure sensor output voltage is 0.86 V or less for at least 6 seconds.

[ ]: HDS Parameter

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

EVAP leak check module pressure sensor failure
PCM internal circuit failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool clear command or by disconnecting the 12 volt battery.