Loading...

Freightliner M2 112 Diesel Particulate Filter (DPF) Pressure Sensors

Freightliner M2 112 Diesel particulate filter (dpf) pressure sensors

Starting at $104.95, AutoBuffy stocks 1 DPF pressure sensors from Standard Ignition. This sensor monitors exhaust backpressure across the diesel particulate filter to tell the ECU when soot load is high enough to trigger a regeneration cycle. A failed sensor prevents accurate regen timing, leading to a clogged DPF, power loss, and costly downstream damage.

Signs your Freightliner M2 112 needs a new DPF pressure sensor

  • Check engine light with DPF-related codes such as P2452, P2453, or P2454 stored in the ECU
  • Forced or stuck regeneration cycles — regen runs constantly or never initiates at all
  • Noticeable loss of power or throttle response, especially under load or at highway speeds
  • Increased fuel consumption as the engine compensates for incorrect DPF backpressure readings
  • DPF warning light or soot-load gauge reading implausibly high or staying pegged at zero
  • Limp mode activation caused by the ECU detecting an out-of-range pressure signal from the sensor

Which DPF pressure sensor should you buy for your Freightliner M2 112?

The main decisions are OE-match versus aftermarket quality tier and whether the sensor comes with its reference hoses and connectors, which are common failure points. A sensor that physically fits but uses a different pressure range or signal output than the original will trigger the same fault codes you are trying to clear.

OEM-equivalent (direct-fit)
Best for
Owners who want plug-and-play accuracy and no recalibration
What you get
Exact pressure range, connector, and signal curve matched to factory spec for the Freightliner M2 112
Premium aftermarket
Best for
High-mileage vehicles needing reliable replacement without OE price
What you get
Upgraded seals and corrosion-resistant housing; meets or exceeds OEM pressure tolerance; often includes reference hoses
Economy / value aftermarket
Best for
Budget-conscious repairs or temporary fixes pending a larger service
What you get
Functional sensor at lower cost; verify pressure range matches OEM spec before installing
Kit with hoses and clamps
Best for
Vehicles where reference hoses are cracked, collapsed, or leaking
What you get
Sensor plus both upstream and downstream hose sections; addresses the full cause of inaccurate readings in one purchase

Diesel particulate filter (dpf) pressure sensors brands we stock for your Freightliner M2 112

Standard Ignition
1 option · from $104.95

Replacing a DPF pressure sensor on a Freightliner M2 112

Easy⏱ 30–60 minutesOBD-II scan tool (to read and clear fault codes)Metric socket and ratchet setFlathead screwdriver or hose pick (for clamp removal)Penetrating oil (if sensor threads are corroded)Nitrile gloves

Locate the sensor on or near the DPF canister — it will have two small rubber reference hoses running to upstream and downstream ports on the filter. Disconnect the electrical connector, remove the hose clamps, unscrew the old sensor, and thread in the new one before reconnecting the hoses and harness. Clear fault codes with a scan tool and take the Freightliner M2 112 on a highway drive to allow the ECU to verify the new sensor reading and, if needed, complete a regeneration cycle.

Frequently asked questions

How much does it cost to replace DPF pressure sensors on a Freightliner M2 112?
Parts start at $104.95 at AutoBuffy. A shop will typically add one to two hours of labor on top of the part cost. Total repair cost varies by Freightliner model and shop rate, but replacing the sensor yourself is straightforward and keeps costs close to the part price alone.
Can I drive my Freightliner M2 112 with a faulty DPF pressure sensor?
Short trips are possible, but it is not advisable. Without an accurate pressure signal, the ECU cannot schedule regeneration correctly. Over days or weeks this allows soot to pack the DPF beyond what regeneration can clear, turning a low-cost sensor replacement into a DPF replacement that can run into thousands of dollars.
Will replacing the DPF pressure sensor clear the check engine light on my Freightliner M2 112?
Yes, if a failed sensor was the root cause of the fault code. After fitting the new sensor, use an OBD-II scanner to clear stored codes. If the light returns, the DPF itself may be excessively clogged or the reference hoses may still be leaking, pointing to an additional repair needed.
How do I know if it is the sensor or the DPF hoses causing the fault on my Freightliner M2 112?
Inspect both reference hoses running from the sensor ports to the DPF before buying a sensor. Pinch, crack, or disconnect a hose and monitor live pressure data with a scan tool — a reading that suddenly jumps or drops to zero with the engine running often points to a hose failure rather than the sensor itself.
How long do DPF pressure sensors last on a Freightliner M2 112?
Most sensors last several years under normal driving conditions. Sensors on vehicles used predominantly for short urban trips — where the DPF rarely fully regenerates — tend to fail sooner due to heat cycling and soot contamination. Towing and high-load work also accelerates wear on the sensor's diaphragm and internal circuitry.
Does a replacement DPF pressure sensor require programming or calibration on a Freightliner M2 112?
A direct-fit OEM-equivalent sensor generally requires no programming — it reads within the factory pressure range and the ECU accepts it immediately. Some late-model Freightliner platforms may require a parameter reset or adaptation with a manufacturer-level scan tool; check your service manual or confirm with a dealer before purchasing.

Shop diesel particulate filter (dpf) pressure sensors by year for the Freightliner M2 112

2018201720162015201420132012

More parts for your Freightliner M2 112

Engine Intake Manifold GasketA/C System O-Ring and Gasket KitEngine Coolant ReservoirHVAC System SwitchEngine Oil Pressure SwitchPower Steering HoseBrake RotorA/C Compressor

Diesel particulate filter (dpf) pressure sensors for other Freightliner models

Freightliner 108SDFreightliner XC Lowered RailFreightliner MB LineFreightliner XC Raised RailFreightliner S2CFreightliner MT55