S2309000003 Service Bulletin/Repair Instructions

Case Number: S2309000003

Release Date: June 2023

Symptom/Vehicle Issue: Customer may experience a knocking, pinging or rattling

noise coming from the engine.

Customer Complaint/Technician Observation: In addition to the symptoms

mentioned above, there may or may not be a Mil-On condition associated with them.

Before performing any diagnostics, please refer to the inspection process listed below

in the Discussion section of this SOL.

Discussion: The following inspection process should be performed to ensure the

knock sensors on the engine are properly installed and the associated wiring

harnesses are properly routed and installed.

The engine has 3 knock sensors installed, front, middle and rear.

Please see images starting on page 2 for descriptions. A borescope may be

necessary to verify the information requested for the inspection procedure.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online

does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear

to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the

appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no

solution is found

Stellantis US LLC
Version 4.5 06/08/2022
The front knock sensor (#5 – sensor body shown in pink, bracket and pigtail shown in

blue, the sensor assembly circled in red in Figure 1 below) has a pigtail attached to the

sensor. The sensor should be mounted to the engine with the pigtail pointing to the

rear of the engine. The pigtail has a retention clip that should be installed in the

bracket (yellow arrow).
clip
Front of Engine

Figure 1
The middle knock sensor (#4 shown in pink in Figure 1 above) only has a connector

(no pigtail) and the connector should be pointing down towards the oil pan.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online

does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear

to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the

appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no

solution is found

Stellantis US LLC
Version 4.5 06/08/2022
The last inspection point is to verify that the main harness is routed BELOW the engine

oil temperature sensor (proper routine seen in the yellow circled area in Figure 2

below).

Figure 2 shows the proper sensor orientation for the front and middle
Mounting bolt for front knock

sensor hidden behind fuel

pump.
Figure 2
If any of the knock sensor orientations or harness routings are not as they are shown in

Figure 2, it is possible the knock sensors are not connected as they should be.

Disconnect the knock sensors, reinstall the knock sensors as necessary. Route the

harnesses/pigtails properly then reconnect the knock sensors.

Test drive the vehicle to see if the symptoms have been eliminated. If not, continue

with normal diagnostics for the symptoms.

This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online

does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear

to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the

appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no

solution is found

Stellantis US LLC
Version 4.5 06/08/2022

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