Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 8156 PID: SPN: 521209 FMI: 9/9 Connectivity Module - Abnormal Update Rate - EcuForce Truck (2024)

FAQs

How do I clear my Cummins fault code? ›

Using a code reader tool, connect to the ECM and find the “fault codes” tab. The displayed codes can generally be clicked on one by one. Another option is to select “erase all faults” and then follow the onscreen instructions. At the end of the procedure, the ignition key should be turned off.

Root Cause: Neither a good or malfunctioning aftertreatment DEF dosing unit can cause Fault Codes 3558 or 3559 to come active as these fault codes are isolated within the OEM wiring harness. An electrical short or open circuit has been detected in the DEF dosing unit OEM wiring harness.

Next, we see SPN which stands for suspect parameter number, this is used to identify the specific component or condition that is triggering a fault. In our example, we see SPN 3216, when looked up this SPN shows that there is an issue with the Aftertreatment Intake NOx sensor.

Fault code 115 indicates a problem with the engine speed sensor circuit.

An OBD error code should only be cleared once the vehicle has been repaired and fully restored to proper working order.

In most cases, successfully repairing the issue that caused your light to come on will cause the check engine light to turn off automatically—but only after 10 to 20 “cycles”. A cycle, in this instance, refers to the process of turning the vehicle on, running it for some time, and turning it off again.

Description This fault indicates a missing fuel level signal at the Common Powertrain Controller (CPC). Check as follows: NOTE: Fuel level sensor is hardwired to instrument cluster. Fuel level signal is multiplexed from instrument cluster to the CPC.

A dosing system for dosing diesel exhaust fluid (DEF) into an inlet of a selective catalytic reduction (SCR) aftertreatment module of a diesel engine is described. The dosing system may comprise a DEF supply line configured to deliver the DEF from a pump to a first injector and a second injector at the inlet.

Fault Code: 351

Possible reduced performance. You cannot fix your self without REPLACING the ECM. You will have to remove the old ECM from the engine and bring it with you when you buy the new one. Cummins will need to retrieve and transfer information from the old ecm to the new after calibrating the new ecm.

SPN stands for Suspect Parameter Number. It's a diagnostic trouble code that provides detailed information about specific faults detected by the vehicle's ECU, making it easier to identify and address issues within the vehicle's electronic systems.

What are SPN and FMI codes? ›

SPN is short for suspect parameter number. It identifies which electrical circuit, part or component of your truck isn't working properly. FMI stands for failure mode identifier—this part of the fault code tells you what type of problem your truck has.

The inactive fault codes were once active at some point in time but now they are fixed, or they fixed themselves.

Fault Code 196 Coolant Level Sensor Circuit - Voltage Below Normal or Shorted To Low Source.

FAULT CODE 2345 (ISC/QSC/ISL/QSL Automotive, Industrial, or Marine Application) Turbocharger Speed Invalid Rate of Change Detected - Abnormal Rate of Change.

SPN 111/FMI 4

Description This Fault Sets when the Common Powertrain Controller (CPC) Detects that there is a Short to Ground on the Coolant Level Circuit or the Engine Coolant Level is Low.