7735450_069 Volvo.Penta engine suspension

Table 1
Diagnostic Trouble Code for High DPF Inlet Pressure    
CDL Code    Code Description    Comments    
E1156-1     High DPF #1 Intake Pressure : Least Severe     The inlet pressure at the Diesel Particulate Filter (DPF) is high.
There are no faults on the 5V sensor supply.
There are no faults for the battery voltage.
There are no faults for the DPF inlet temperature.    
Test Step 1. Check for Associated Diagnostic Trouble CodesDiagnostic code E1156-1 will normally have an associated high-level code. Troubleshoot the E1156-1 code before troubleshooting any of the high-level codes that are listed in Table 2.
Table 2
Associated High-Level Diagnostic Trouble Codes    
E1025     2    
E1026     2    
E593     2    Diagnostic code E1156-1 may have associated low-level codes. Troubleshoot the low-level codes that are listed in Table 3 before troubleshooting the E1156-1 code.
Table 3
Associated Low-Level Diagnostic Trouble Codes    
E995     2 or 3    
E997     1 or 2    Results:
An associated low-level diagnostic trouble code is not present. - Proceed to Test Step 2.
An associated low-level diagnostic trouble code is present. - Repair: Refer to Troubleshooting, "Diagnostic Trouble Codes" in order to troubleshoot the associated low-level diagnostic code. If the fault is not eliminated, proceed to Test Step 2.Test Step 2. Ash Service Maintenance
Determine the most recent ash service of the DPF.Results:
An ash service was performed within the last 5000 hours. - Proceed to Test Step 3.
An ash service was not performed within the last 5000 hours. - Proceed to Test Step 4.Test Step 3. Check for Contamination
Remove the DPF.
Check for contamination on the face of the DPF and the Diesel Oxidation Catalyst (DOC).Results:
The DOC and the DPF are not contaminated. - Repair: Contact the Technical Communicator at a Caterpillar dealer.STOP
There is oil, fuel, or coolant on the DPF and/or the DOC. - Repair: Perform the following procedure:
Take the DPF to an authorized dealer for repair.
Clean the DOC with compressed air.
Reconnect the DOC and the DPF.
Start the engine. Run the engine at 1400 RPM with no load. Run the engine for at least 15 minutes or run the engine until there is no more white smoke.Note: Running the engine until there is no more white smoke is not an ash service. Do not reset the"Diesel Particulate Filter Ash Service Reset".
If the 3609-15 diagnostic code remains active replace the DPF. Perform a "Manual Diesel Particulate Filter Regeneration".
Return the unit to service.STOPTest Step 4. Perform an Ash Service Test
Remove the DPF. Refer to Disassembly and Assembly, "Diesel Particulate Filter - Remove".
Take the DPF to an authorized dealer for an ash service to be performed.
Install the DPF. Refer to Disassembly and Assembly, "Diesel Particulate Filter - Install".
Use the electronic service tool to perform an ARD Ignition Test. Confirm that the fault has been eliminated.Results:
There are no active diagnostic codes. - Repair: Return the unit to service.STOP
The E1156-1 diagnostic code is active. - Repair: Replace the DPF. Perform an ARD Ignition Test in order to verify that the fault has been eliminated.Return the unit to service.STOP