DOOR GP-CAB 2112736 - Caterpillar

Table 1
Diagnostic Trouble Code for Low Intake Manifold Air Pressure
J1939 Code CDL Code Code Description
(code descriptions may vary) Notes
102-18 E1045 (2) Engine Intake Manifold #1 Pressure : Low - moderate severity This pressure is a variable value that is calculated by the ECM. The resulting value depends on the operating conditions of the engine. Probable Causes
Intake air filter
Air intake system
Wastegate regulator
Turbocharger or turbochargersRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 2
Troubleshooting Test Steps Values Results
1. Intake Air Filter
A. Check the air filter restriction indicator, if equipped.
B. Ensure that the air filter is clean and serviceable.
Air filter
Result: The air filter is blocked.
Repair: Replace the air filter element. Refer to the Operation and Maintenance Manual, "Engine Air Cleaner Element - Replace".
Result: The air filter is OK.
Proceed to Test Step 2.
2. Air Intake System
A. Check the air intake system for the following defects:
Blockages
Restrictions
Damage to the air intake ducts and hoses
Loose connections and air leaks
Air intake
Result: The air intake system is blocked, restricted, damaged, or loose.
Repair: Make all necessary repairs to the air intake system.
Result: The air intake system is OK.
Proceed to Test Step 3.
3. Wastegate Regulator
A. Use the electronic service tool to check for diagnostic codes that relate to the wastegate regulator.
Wastegate regulator
Result: Diagnostic codes are present that relate to the wastegate regulator.
Repair: Rectify the cause of any related codes. Refer to Troubleshooting, "Diagnostic Trouble Codes".
Result: There are no diagnostic codes that relate to the wastegate regulator.
For engines that have a single turbocharger, proceed to Test Step 4.
For engines that have twin turbochargers, proceed to Test Step 5.
4. Turbocharger
Note: The turbocharger that is installed on the engine is a nonserviceable item. If any mechanical fault exists, then the faulty turbocharger must be replaced.
A. Check that the compressor housing for the turbocharger is free of dirt and debris.
B. Check that the turbine housing for the turbocharger is free of dirt and debris.
C. Check that the turbine blades rotate freely in the turbocharger.
Turbocharger
Result: There is a fault in the turbocharger.
Repair: Replace the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Remove" and Disassembly and Assembly, "Turbocharger - Install".
Result: The turbocharger is OK.
Contact the Dealer Solutions Network (DSN).
5. Turbochargers
Note: The turbochargers that are installed on the engine are nonserviceable items. If any mechanical fault exists, then the faulty turbocharger must be replaced.
A. Check that the compressor housings for the turbochargers are free of dirt and debris.
B. Check that the turbine housings for the turbochargers are free of dirt and debris.
C. Check that the turbine blades rotate freely in the turbochargers.
Turbocharger
Result: There is a fault in a turbocharger.
Repair: Replace the faulty turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Remove" and Disassembly and Assembly, "Turbocharger - Install".
Result: The turbochargers are OK.
Contact the Dealer Solutions Network (DSN).