COUPLING 4993179 - Caterpillar

Table 1
Diagnostic Trouble Code    
J1939 Code    Code Description    Comments    
3242-18     Particulate Trap Intake Gas Temperature : Low - moderate severity (2)     The Aftertreatment Regeneration Device (ARD) has been running for at least 30 seconds. The temperature at the intake of the DPF is below
50° C (122° F).
Active regeneration is immediately disabled. Engine power is derated. The code is logged. The code remains active until electrical power to the ECM is cycled.    
Follow the troubleshooting procedure in order to identify the root cause of the fault.    
Illustration 1 g02626310
(1) ARD combustion head (2) ARD outlet duct (3) Clamps (4) DOC intake (5) Diesel Oxidation Catalyst (DOC)
Check for evidence of any gas leaks in the duct between the ARD combustion head and the DPF.
Carefully inspect the duct between the outlet of the ARD and the intake to the DOC. Look for the following faults:
Missing duct, cracked duct, or disconnected duct
Loose clamps, broken clamps, or missing clamps
Make sure that the clamp between the DOC and the DPF is not missing, broken, or loose.
Perform any necessary repairs.