CM850 Electronic Control System – FAULT CODE 433

Intake Manifold Pressure Sensor Circuit – Data Incorrect


Overview

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

Intake manifold pressure sensor circuit – data incorrect. An error in the intake manifold pressure sensor signal was detected by the ECM.

Derate in power output of the engine.

Intake Manifold Pressure Sensor Circuit
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Circuit Description

The intake manifold pressure sensor monitors intake manifold pressure and passes information to the electronic control module (ECM) through the engine harness. This value is one of the many inputs used by the ECM to determine the correct air/fuel ratio for proper engine operation.

Component Location

The intake manifold pressure sensor is located on the intake air manifold, behind the intake air horn. 100-002 for a detailed component location view.

Shop Talk

At key-on, before the engine is started, the readings for intake manifold pressure, barometric pressure, and exhaust pressure are compared. This fault code occurs if the intake manifold pressure sensor reading is different from the other three. This check is only done once after the keyswitch is turned on.

Refer to Troubleshooting Fault Code t05-433

Last Modified:  08-Jul-2010