Cummins fault code 1718 is the Cummins Engine Misfire for Multiple Cylinders – Condition Exists document for the ISX11.9 CM2250 (2010-12) engine platform, a 8-page PDF that reproduces the official fault code write-up read with Cummins INSITE. An algorithm in the ECM calibration watches engine speed as each injector fires at idle to find cylinders that contribute too much or too little, and it is meant to help diagnose misfire and low-power complaints once coolant temperature is above 71 C [160 F].
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISX11.9 CM2250 and ISX15 CM2250 |
| System / group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault code | 1718 — PID None, SPN 1322, FMI 31/31 |
| Warning lamp | Amber |
| Publication reference | Cummins troubleshooting bulletin 2883445 (engine misfire for multiple cylinders circuit) |
| Pages | 8 |
| File size | 0.2 MB |
| Format | |
| Language | English |
What Cummins fault code 1718 means
It sets when two or more cylinders have high or low contribution to engine speed. The amber lamp illuminates and the driver may notice low power, rough idle or misfire. The document walks a technician through the summary and the guided troubleshooting steps needed to confirm and clear the code.
Document table of contents
- Overview and circuit description
- Component location
- Conditions for running the diagnostics
- Conditions for setting the fault code
- Action taken when the fault code is active
- Conditions for clearing the fault code
- Shop Talk and possible causes
- Associated procedures and guided troubleshooting steps
Applicable truck models
This troubleshooting document covers Cummins ISX11.9 CM2250 and ISX15 CM2250 engines in Class 6 to 8 trucks. It is filed under the ISX11.9 CM2250 (2010-12) / DTCs group and also applies to ISX12 CM2250 installations, so confirm the engine dataplate before ordering parts. Cross-reference the calibration revision with Cummins official engine support before clearing the code.
Who needs this Cummins fault code 1718 manual
Heavy-duty diesel technicians, fleet maintenance teams and workshop owners diagnosing a multiple-cylinder misfire complaint use this reference to read SPN 1322 / FMI 31/31 correctly and to follow the guided steps in INSITE. The possible causes it lists include:
- valve lash out of specification
- a damaged cylinder or high blowby
- a damaged or held-open valve
- a damaged cylinder head or gasket
- extreme camshaft wear
- a missing or damaged injector sealing washer
- an injector malfunction
The full 8-page PDF for engine misfire fault code 1718 is available in the DiagTechPro manuals library; a free account is required to download.
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