SHAFT 7D3454 - Caterpillar

Conditions Which Generate This Code:The turbocharger compressor outlet pressure is used to obtain Boost Pressure. The ECM reads turbocharger compressor outlet pressure below 0 kPa (0 psi). The engine speed is within 50 rpm of low idle for 5 seconds. The diagnostic codes 262-03, 262-04, 273-03, 273-04, and 273-13 may or may not be active.System Response:The CID-FMI is logged in memory. The CID-FMI may be viewed on a display module or the ET. The ECM flags turbocharger compressor outlet pressure as invalid data regardless of actual Turbocharger Boost Pressure. The ECM uses a default value of 0 kPa (0 psi).There are two conditions that can cause this problem. The first condition exists when the diagnostic codes 262-03, 262-04, 273-03, 273-04, and 273-13 are not present and the Boost Pressure is below normal. This condition indicates a leak in the air system. Check the turbochargers and the air system for leaks.The second condition exists when any of the following diagnostic codes 262-03, 262-04, 273-03, 273-04, and 273-13 are active and the Boost Pressure is below normal. This condition indicates a problem with the sensor or the wiring.Test Step 1. Perform the following diagnostic procedure: Engine Sensor Open/Short TestResults:
OK - STOP
REPAIRED, OK - STOP