SENSOR 1984237 - Caterpillar

Note: If this fault occurs only under load, refer to Troubleshooting, "Acceleration Is Poor or Throttle Response Is Poor".Probable Causes
Diagnostic codes
ECM parameters
Accessory and/or parasitic loads
Flash file
Throttle signal
Air intake and exhaust system
Turbocharger
Fuel supply
Low compression (cylinder pressure)
Electronic unit injectors
Individual malfunctioning cylinders
Table 1
Associated Diagnostic Trouble Codes
J1939 Code CDL Code
157-18 E398 (2) Recommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 2
Troubleshooting Test Steps Values Results
1. Diagnostic Codes
A. Establish communication between the electronic service tool and the Electronic Control Module (ECM). Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the Warranty Report and the Product Status Report with Histograms before performing any troubleshooting or clearing any diagnostic codes.
Note: The downloaded information will be required by the Dealer Solutions Network (DSN) if troubleshooting assistance is needed.
C. Use the electronic service tool to check for active or logged codes.
Diagnostic codes
Result: There are active or logged codes.
Repair: Troubleshoot any codes before continuing with this procedure.
Result: There are no active or logged codes.
Proceed