68404997AA PM sensor Precision Heavy-Duty WJIECO Particulate Sensor Compatible with Fits For RAM Pickup diesel vehicles Diesel Exhaust Particulate Matter Sensor OEM Replace Part Number 68404997AA 0281007500 0281007496 PM Sensor Automobiles Sensors

68404997AA PM sensor

https://wjieco-autoparts.com/

https://www.amazon.com/dp/B0F4XKV1VT

The WJIECO 68404997AA PM sensor is the latest revision of the diesel particulate matter (PM) sensor for the 2018 Ram 2500, 3500, 4500, and 5500 heavy-duty trucks with the 6.7L inline-six Cummins turbo diesel. Positioned after the DPF in the exhaust system, it continuously samples soot loading and reports that data to the ECM so regeneration begins exactly when it should. This part supersedes the earlier 68352149AA number, which means if your 2018 truck originally left the factory with that sensor, this revised unit is the correct, updated direct-fit replacement.

## Fitment and Compatibility

### Compatible Vehicles

– 2018 Ram 2500 – 6.7L i6 Cummins turbo diesel
– 2018 Ram 3500 – 6.7L i6 Cummins turbo diesel
– 2018 Ram 4500 – 6.7L i6 Cummins turbo diesel
– 2018 Ram 5500 (chassis cab) – 6.7L i6 Cummins turbo diesel

This 68404997AA PM sensor bolts into the original sensor port and uses the factory electrical connector. No wiring modification, tuning, or relearn procedure is needed. Because this revision also covers the 5500 chassis cab application, it is the broader fitment choice among the 2018 HD sensor numbers. Fleet and upfit shops often stock this part to cover the whole 2018 heavy-duty Cummins range.

### Interchangeable Part Numbers

The WJIECO 68404997AA PM sensor cross-references the earlier Mopar revisions in the same family:

– Mopar: 68352149AA, 68352149AB
– Bosch: 0281007500, 0281007496

If your original sensor reads 68352149AA, this upgraded revision is the recommended replacement. Always confirm the OE number on your failed unit against this list before ordering.

## How the Diesel PM Sensor Works

### What It Measures

The sensing element heats up and measures the soot concentration in the exhaust flowing past the DPF. As the filter loads with particulate, the sensor signal rises. Once the soot threshold is crossed, the ECM starts a high-temperature regeneration that burns accumulated soot off and returns the filter to a clean state.

### Why Accurate Readings Matter

When this 68404997AA PM sensor drifts, the ECM makes bad calls on regeneration. Too-frequent cycles waste fuel and add heat stress to the aftertreatment, while delayed cycles let the DPF plug and force the truck into reduced-power mode. Fitting the revised sensor restores the factory regeneration strategy on the 6.7L Cummins, preserves fuel economy, and protects the expensive aftertreatment system from soot overload.

## Signs Your PM Sensor Needs Replacement

Watch for these symptoms on a 2018 Ram HD with the 6.7L Cummins:

– Exhaust filter warning messages or reduced power under load
– Check engine light storing soot or DPF efficiency codes (for example P2453, P2454)
– Regenerations that run back to back, or never seem to complete
– Dropping fuel mileage and repeated filter cleaning reminders

If your truck is storing a diagnostic trouble code, look up the exact definition and likely causes on the free code library at [OBD-Codes.com](https://www.obd-codes.com) before replacing parts.

## Installation Overview

1. Set the truck on level ground, allow the exhaust to cool, and find the PM sensor on the DPF assembly.
2. Unplug the electrical connector and unscrew the old sensor.
3. Install the new WJIECO 68404997AA PM sensor into the same port and seat it like the factory unit.
4. Reconnect the connector, run the engine, and clear codes with a scan tool.

The swap typically takes 20-30 minutes with basic hand tools, and the sensor does not need to be programmed after install.

## Why Choose WJIECO

– Updated revision that directly supersedes 68352149AA on 2018 HD Cummins trucks
– Sealed, high-temperature housing built for heavy-duty exhaust duty cycles
– Factory-matched connector and thread for a fast, clean install
– Each unit inspected before shipping to keep DOA rates low
– 12-month warranty and US-based after-sales support

For the 2018 Ram 2500/3500/4500/5500 owner, the WJIECO 68404997AA PM sensor is the upgraded, worry-free replacement that restores correct DPF soot readings and keeps the Cummins pulling without surprise dealer visits.