Shutdowns May Occur with NOx Sensor Diagnostic Codes Present on Certain CG137, G3400, G3500, and G3600 Gas Engines {191N, 7432} Caterpillar

Engine

CG137-12 (S/N: WRX1-UP)

G3408C (S/N: BAZ1-UP)

G3412C (S/N: 6ZM1-UP; SPY1-UP)

G3508 (S/N: N8B1-UP; 9TG1-UP; WPM1-UP; WPN1-UP; DLR1-UP)

G3508B (S/N: N8C1-UP; RBK1-UP)

G3512 (S/N: 7NJ1-UP; N2P1-UP; WPP1-UP; WPR1-UP)

G3512B (S/N: JHH1-UP; N2S1-UP)

G3516 (S/N: N6B1-UP; N6C1-UP; 4EK1-UP; WPT1-UP; WPW1-UP)

G3516B (S/N: N6E1-UP; JEF1-UP)

G3516J (S/N: N6W1-UP)

G3520B (S/N: GLF1-UP)

G3606 (S/N: JFE1-UP)

G3608 (S/N: XH71-UP)

G3612 (S/N: BB21-UP)

G3616 (S/N: ZZY1-UP)

Petroleum Engine

G3520B PETROLEUM (S/N: TPC1-UP)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

The engine shuts down with NOx sensor diagnostic codes either active or logged.

Solution

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Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.

Follow the proper troubleshooting steps available on SIS web. If the troubleshooting steps lead to a NOx sensor being replaced, submit a PSR, picture of the sensor installation, and any additional comments through the CPI Feedback function within SIMSi reference CPI 399461. Hold the replaced part as a Send it Back request will be generated.