Solution K59554255
Thursday, August 29, 2019 9:05:34 PM CEST

** SOLUTION **
Title

Mack Chassis - Particulate Matter (PM) Sensor Diagnostic Trouble Codes (DTC)
Illuminating The Malfunction Indicator Lamp (MIL); Tech Tip TT-014-2016 - US14+O
BD16, US17+OBD16 And Newer Emissions, Common Model Year 2017 And Newer - T
o Be Used For EVERY Visit

Mack Models
Mack Model

LR , MRU - TerraPro , TE - TerraPro , AN - Anthem , CHU - Pinnacle, Axle back , C
XU - Pinnacle, Axle front , GR - Granite , GU - Granite , PI - Pinnacle , TD - Titan

Emission Standard
Emission Standard

US14+OBD16 , US17+OBD16 , US17+OBD18 , US17+OBD19

Engine family
Engine family

MP7 , MP8 , MP10

** SOLUTION **
Cause

With the implementation of US14+OBD16 Emissions controls (Model Year 2017), a
new sensor was required to monitor particulate matter (PM)—soot—levels in exhaust
that has already passed through the Emissions Aftertreatment System. Excessive
particulate levels at this stage can indicate a damaged or failed Diesel Particulate Filter
(DPF). The PM sensor's only purpose is monitoring and is not used in any EATS
(regeneration and NOx conversion) functions. Codes set by the sensor will not
affect performance or cause a Derate.
The PM sensor is located after the exhaust muffler (SCR) and very close to NOx sensor
after the SCR (NOx2).

Solution

This Solution is relevant regardless of previous visits and sensor
replacements. At this time, multiple sensor failures are not
uncommon, regardless of how new the sensor is. The same
procedure should be followed for every instance.
PLEASE NOTE: Instructions have been updated as of 20 June
2019. If diagnostics indicate that sensor replacement is required,
please follow FSB 284 - 068 Exhaust Particulate Sensor, Repair
( 2016 ) or FSB 284 - 069 ( 2017 ) Exhaust Particulate Sensor,
Repair. An eService case is not required
Precautions
1. The PM sensor is a smart sensor (12V supply and CAN lines) with an orientation tab as
seen below:

Installation torque of 50 Nm +/- 5
Nm
2. PM sensors need to be handled carefully. Dropping them most likely results in permanent
damage to the sensor. Keep cap on the sensor until ready to install the sensor to avoid any
contamination.
3. NEVER (DO NOT) apply anti-seize to install the PM sensor. If for some reason
someone applied it before this repair, thoroughly clean the threads and sealing surfaces while
replacing the sensor.
4. A removed PM sensor should be capped immediately (cap from replacement sensor) and
packaged carefully, if returning to warranty or investigation purposes.

Repair
IMPORTANT:
• If a chassis arrives with a derate warning active, the PM sensor is not the source of the
derate and there is a separate existing issue.
• Prior to installing a new sensor for any of the steps below, gently shake the sensor and
ensure it does not rattle. If noise is heard, another sensor should be used.

1. Verify the chassis emissions level

- Details can be found in the Product Details box on the Product tab in PTT as seen below:

• For US17+OBD16 (Common Rail Fuel System) Chassis setting DTCs P24DA or P1031
ONLY:
- Software improvements have been released to address this code. Refer to CBR Solution
K00527512.
• For US17+OBD16 Chassis setting any other codes for the PM Sensor, Proceed with
instructions below.
• For US14+OBD16 (Commonly 2017 model year): Proceed with instructions below.

2. Check the DTC Status
Only troubleshoot PM sensor faults if the fault is Active or Confirmed as shown below.

3. Follow the set of instructions for the relevant DTC(s):
• P1033, P1034, P24D0 or U02A3 fault codes (Confirmed or Active)
- These PM sensor fault codes require connections and wiring harness checks for power
supply and CAN communications. Repair can be verified with just KEY ON as diagnostics
run immediately.
- If wiring harness and connections check isolates the problem to the sensor:
1. Remove the sensor from the exhaust.
2. Obtain a new sensor. Gently shake the new sensor to ensure it does not rattle.
NOTE: A sensor that rattles should not be installed.
3. Install the new sensor.
4. Clear the DTCs and release the vehicle.

• P1031 and P24DA (both fault codes and only these fault codes Active)
- If the vehicle has PM sensor part number 22733524 or older:
1. Replace the PM sensor with the latest part. Gently shake the new sensor to ensure it
does not rattle.
NOTE: A sensor that rattles should not be installed.
2. Update the Engine Control Module (EMS) software and clear all codes.
3. Release the vehicle.
- If the PM sensor is the current part number:
1. Verify that the EMS software is current.
2. Remove the sensor from the exhaust.
3. Obtain a new sensor. Gently shake the new sensor to ensure it does not rattle.
NOTE: A sensor that rattles should not be installed.
4. Install the new sensor.
5. Clear the DTCs and release the vehicle.

• All other PM sensor fault codes (Confirmed or Active)
P24B3, P24AF, P2AB0, P24B1, P24B0, P24DA, P24B7, P24B5, P24D1, P24FC, P24AE,
P24B4, and P1032. (Highlighted are common faults).
1. Verify that the EMS software is current.
2. Remove the sensor from the exhaust.
3. Obtain a new sensor. Gently shake the new sensor to ensure it does not rattle.
NOTE: A sensor that rattles should not be installed.
4. Install the new sensor.
5. Clear the DTCs and release the vehicle.
Internal comments (BO)

• If a Diagnostic Monitor fails, DO NOT PERFORM A REGEN . Perform the
following steps:
1. Turn the vehicle's ignition OFF.
2. Restart Premium Tech Tool.
3. Reconnect to the vehicle with PTT.
4. Start the engine.
5. Rerun the Diagnostic Monitor.

NA_Sister solutions

K00527512, K14122525, K47547856

Campaign code

FSB284-067

Solution visibility

Dealer distribution

Function(s)/component(s) affected
Function affected

1 1 0 EMS , 2 1 0 ACM , TT

, SCR , DPF

Function Group
Function Group

254 catalytic converter; exhaust emission control equipment , 258 emissions after-

treatment , 2846 Sensor

Customer effect
Main customer effect

soot , diagnostics/methodology , fault code/display

Fault Codes And Error Codes
OBDII Diagnostic Trouble

P1031 , P1032 , P1033 , P1034 , P249C , P24AE , P24AF , P24B0 , P24B1 , P24B3

Codes (P, U, B Format)

, P24B4 , P24B5 , P24B7 , P24D0 , P24D1 , P24DA-00 , P24FC , P2AB0

Administration
Author

RU4469V

Dealer ID

RU4469V

Last modified by

A241298

Creation date

19-04-2018 16:04

Date of last update

05-08-2019 15:08

Review date

15-04-2018 00:04

Status

Published

Average score

3

Number of scores

2