This 18-page PDF is an official Fault Code 1241 DTCs troubleshooting guide covering the Accelerator Pedal or Lever Position Sensor 2 Circuit — Voltage Below Normal or Shorted to Low Source condition. It applies to ISB6.7 CM2250 and related engine platforms and walks technicians through guided diagnostic steps, harness inspections, and ECM calibration verification.
Official Fault Code 1241 DTCs document details
| Brand | Cummins |
| Model coverage | ISB6.7 CM2250, ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, QSB6.7 CM2250, QSL9 CM2250, GX CM2250 |
| System / Group | Diagnostic Trouble Codes (DTCs) — Accelerator Pedal Position Sensor 2 Circuit |
| Publication no. | — |
| Year / Revision | Last modified 20-Jan-2011 |
| Pages | 18 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview — Circuit Description (Hall Effect accelerator pedal position sensor operation)
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Code (SPN 2623, FMI 4, PID S385)
- Action Taken When the Fault Code is Active — Amber CHECK ENGINE lamp, severe derate / limp home power
- Conditions for Clearing the Fault Code
- Shop Talk — Intermittent troubleshooting tips, common causes
- Associated Procedures Table (Procedure 019-031, 019-032, 019-071, 019-360, 019-361)
- Guided Step 1 — Check sensor supply fault codes (Fault Code 1696)
- Guided Step 2 — Check accelerator pedal position sensor and circuit (Steps 2A–2D, 5-volt supply verification, circuit response with jumper wire, Fault Code 1239 cross-check)
- Guided Step 3 — OEM harness inspection (Steps 3A–3F: connector pins, open circuit, pin-to-pin short, pin-to-ground short, resistance thresholds of 10 ohms and 100k ohms)
- Guided Step 4 — Check ECM calibration and clear fault codes (Steps 4A–4B, INSITE™ electronic service tool)
Applicable truck models
This document is written for Cummins engines used across medium- and heavy-duty truck and equipment platforms. Engine models explicitly referenced include ISB6.7 CM2250 (2010–2012 production), ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, QSB6.7 CM2250, QSL9 CM2250, and GX CM2250. Additional associated procedure references extend to ISF2.8 CM2220, ISF3.8 CM2220, ISB4.5/ISD4.5/ISD6.7 CM2150 SN, ISL8.9 CM2150 SN, ISM11 CM876 SN, and ISZ13 CM2150. For OEM-specific pedal location and harness routing, consult the chassis manufacturer’s service manual. Visit Cummins official website for the latest technical service bulletins.
Who needs this Fault Code 1241 DTCs manual
Diesel mechanics and workshop owners diagnosing an amber CHECK ENGINE lamp with limp-home-only power on CM2250-equipped trucks need this guide. It provides the exact voltage thresholds, resistance specifications, and INSITE™ service tool procedures required to isolate the accelerator pedal position sensor 2 circuit fault efficiently.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
