Overview

Code

Fault Code: 1852

PID: P97

SPN: 97

FMI: 0/16

LAMP: Amber

SRT:    

Reason

The Water in Fuel Indicator indicates that the water level is above warning level.

Effect

None on performance.

Water-in-Fuel Indicator Sensor Circuit

Circuit Description

The water-in-fuel sensor is in the fuel filter. The engine control module (ECM) provides a 5 volt reference signal to the water-in-fuel sensor. When the water collected in the fuel filter covers the sensor probes, the water-in-fuel sensor pulls the 5-VDC reference voltage down, indicating high water accumulation in the fuel filter.

Component Location

The water-in-fuel sensor is integrated into the bottom of the OEM supplied suction fuel filter.

Conditions for Running the Diagnostics

This diagnostic runs continuously when the engine is running.

Conditions for Setting the Fault Codes

The Engine Control Module (ECM) detected water in fuel for an extended period of time.

Action Taken When the Fault Code is Active

• The ECM illuminates the amber CHECK ENGINE lamp and/or the malfunction indicator lamp (MIL) immediately when the diagnostic runs and fails.

Conditions for Clearing the Fault Code

• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• The “Reset All Faults” command in the recommended Cummins electronic service tool or equivalent can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk

Water in the fuel can do extensive damage to the fuel system, due to the tight tolerances of the fuel system components.

The fuel filter must be drained immediately.

If this fault code is active and there is no water in the fuel filter then a malfunctioning Water-In-Fuel sensor or water in the sensor connector could be causing the fault.

Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.

Contact Us

Whatsapp: +84.858.966.333
Facebook: VIETVehicle Remote Delete Service
YouTube: VIETVehicle – ECM Delete Tuning
Tiktok: VIETVehicle.com
Website: VIETVehicle.com