Electronic Control System Signature, ISX and QSX15 Engines – FAULT CODE 433

Intake Manifold Pressure Circuit


Overview

CODE REASON EFFECT
Fault Code: 433
PID: P102
SPN: 102
FMI: 2/2
LAMP: Yellow
SRT: 

Voltage signal at the intake manifold pressure circuit indicates high intake manifold pressure, but other engine characteristics indicate that intake manifold pressure
must be low.

Derate to no-air setting.

Intake Manifold Pressure Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The intake manifold pressure/temperature sensor monitors intake manifold pressure and passes information to the electronic control module (ECM) through the sensor harness. If intake manifold pressure exceeds 127 mm Hg [5 in Hg] for more than 20 seconds while the engine is under 5-percent load, it will cause a derate condition.

Component Location

The intake manifold pressure/temperature sensor is located on the cylinder head, between the air horn and the front of the engine.

Shop Talk

The ECM checks for this fault
only at engine speeds up to 50 rpm above the set idle speed. If the intake manifold pressure shows too high of a value at this time, the ECM will log this fault code.

Refer to Troubleshooting Fault Code t05-433.

Last Modified:  26-Oct-2010