Engine diagnosis indicator lamp lights up in instrument cluster and
fault code P203B00 is stored in the AdBlue® (SCR) control unit
Topic number

LI14.40-N-069569

Version

2

Function group

14.40 Exhaust aftertreatment, AdBlue

Date

09-09-2019

Validity

Model 906 as from 01.07.13 with engine 651
Model 906 as of 01.07.13 with engine 642

Reason for change

Remedy added for noticeable problems with the capillary stop connectors of the electric lines between the AdBlue® control unit (SCR) and the AdBlue® tank module
(A102).

Reason for block

Complaint:

Engine diagnosis indicator lamp lights up in instrument cluster and fault code P203B00 stored in AdBlue® (SCR) control unit.

Cause:
•
•
•

Erroneous refueling of AdBlue® tank.
Poor contact of AdBlue® fill level sensor on electrical plug of AdBlue® tank module (A102).
Temporary resistance in the capillary stop connectors of the electric lines between the AdBlue® control unit
(SCR) and the AdBlue® tank module (A102).

Remedy:
1.

Visually inspect AdBlue® tank for signs of erroneous refueling.
Information: To do so, check the AdBlue® concentration level (see AR14.40-D-2041S for model 906). In the
event of any erroneous refueling, the repair work must be conducted as per the procedure in the Service Information bulletin SI14.40-S-0014A.

2.

_______________________________________________________________________________
Check function of AdBlue® fill level sensor using actual values for fill level of AdBlue® tank (absolute value) in
XENTRY Diagnosis.
Information: Extract approx. 2-3 liters of AdBlue® from AdBlue® tank (see AR14.40-D-2014-02A and AR14.40D-2014-02S for model 906), the fill level in the AdBlue® tank must change accordingly. If there is no change in
the fill level in the AdBlue® tank, research further to determine reason for problem and introduce appropriate repair measures.

3.

_______________________________________________________________________________
Check electric lines between AdBlue® (SCR) control unit and AdBlue® fill level sensor in AdBlue® tank module
(A102) (see picture 01).

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Information: If there are any noticeable faults with the electric lines between the AdBlue® (SCR) control unit and
the AdBlue® fill level sensor in the AdBlue® tank module (A102), appropriate repair measures must be introduced.
4.

_______________________________________________________________________________
Replace coupling housing, contact sockets and single conductor seals of electrical plug on the AdBlue® tank
module (A102) (pins 3, 4 and 5 (contacting of fill level sensor)) (see picture 01).
Information: Conduct only when operation steps 1, 2 and 3 are conducted without any noticeable problems. To
repair the electrical plug, please refer to documents AR00.19-D-0100A (model 906), and AR00.19-S-0120E.
_______________________________________________________________________________
Note: In the event of noticeable problems with the capillary stop connectors of the electric lines between the AdBlue® control unit (SCR) and the AdBlue® tank module (A102), the capillary stop connectors must be replaced
with solder terminal connectors in accordance with the relevant instructions (see AR00.19-P-0100-09A).
Info: For the layout of the capillary stop connectors of the electric lines between the AdBlue® control unit (SCR)
and the AdBlue® tank module (A102), see picture 03.

Attachments
File

Description

01.jpg

Pins 3, 4 and 5 (contacting of fill level sensor) of electrical
plug on AdBlue® tank module (A102) (model 906).

03.jpg

Layout of capillary stop connectors of the electric lines
between the AdBlue® control unit (SCR) and the AdBlue® tank module (A102).

Symptoms
Power generation / Engine management / Indicator lamp / Engine diagnosis / lit
Power generation / Engine management / Function / Malfunction

Control unit/fault code
Control unit

Fault code

Fault text

N141 - Selective catalytic reduction SCRCM3

P203B00

The AdBlue® fill level sensor has a malfunction. _

Parts
Part number

ES1 ES2 Designation

Quantity Note

EPC

A 211 545 11 28

Coupling housing

1

X

A 013 545 15 26

Female contact

3

X

A 000 545 71 80

Single-wire seal

3

X

A 001 546 99 41

Solder terminal connector

As required.

X

Operation numbers/damage codes
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Op. no.

Operation text

Time

54-1011

PERFORM QUICK TEST

---

47-0643

SEPARATE PARTS OF ADBLUE(R)
SYSTEM: .................... CHECK ACCORDING TO FAULT CODES

---

54-9201

REPLACE ELECTRICAL CONNECTOR --FOR .....

Damage
code

Note

47072 73

AdBlue(R) tank fill level sensor (E) electrical fault
Information: Conduct only when
operation steps 1, 2 and 3 are conducted without any noticeable problems.
The listed damage code is not to
be considered as an acceptance of
costs. The general guidelines in the
Warranty Manual apply.

WIS-References
Document number

Title

Note

Allocation

AR00.19-D-0100A

Wiring harness general repair methods

Model 906

Remedy

AR00.19-S-0120E

Remove contacts from
connectors, couplings

Remedy

AR14.40-D-2014-02A

Empty/fill AdBlue tank

Engine 642 in model 906
Remedy
with code KP2 (AdBlue
tank, 12 l, in engine compartment) and with code
MH1(Low-pollutant engine
EPA 10 / CARB)
Engine 642 in model 906
with code KP2 (AdBlue
tank, 12 l, in engine compartment) and with code
MH3 (Low-pollutant engine
EPA 13 / CARB)
Engine 642 in model 906
with code MA6 (Emissions
class, Euro 6b N1 GR.III/
N2) and except code KP2
(AdBlue tank, 12 l, in engine
compartment)
Engine 642 in model 906
with code MB6 (Low-pollutant vehicle, Euro 6 Gr. 1)
and except code KP2 (AdBlue tank, 12 l, in engine
compartment)
Engine 642 in model 906
with code MH5 (Low-pollutant engine EPA 14/CARB)
and except code KP2 (Ad-

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Blue tank, 12 l, in engine
compartment)
Engine 642 in model 906
with code MH7 (Low-pollutant engine EPA 16/CARB)
and except code KP2 (AdBlue tank, 12 l, in engine
compartment)
Engine 642 in model 906
with code MP6 (Euro VI engine version) and except code KP2 (AdBlue tank, 12 l,
in engine compartment)
Engine 651 in model 906
with code MA6 (Emissions
class, Euro 6b N1 GR.III/
N2)
Engine 651 in model 906
with code MB6 (Low-pollutant vehicle, Euro 6 Gr. 1)
Engine 651 in model 906
with code MH5 (Low-pollutant engine EPA 14/CARB)
Engine 651 in model 906
with code MH8 (Low-pollutant engine, SULEV)
Engine 651 in model 906
with code MI6 (Emissions
class, PROCONVE L6)
Engine 651 in model 906
with code MP6 (Euro VI engine version)
AR14.40-D-2014-02S

Empty/fill AdBlue tank

Engine 642 in model 906.
6/7 with code MH1 (Lowpollutant engine EPA 10 /
CARB) and except code
KP2 (AdBlue tank, 12 l, in
engine compartment)
Engine 642 in model 906.
6/7 with code MH3 (Lowpollutant engine EPA 13 /
CARB) and except code
KP2 (AdBlue tank, 12 l, in
engine compartment)

Remedy

AR14.40-D-2041S

Check AdBlue concentration Model 906

Remedy

SI14.40-S-0014A

Service Information bulletin:
Filling AdBlue tank

Remedy

AR00.19-P-0100-09A

Repair wiring harness using
solder connectors

Remedy

Validity
Vehicle
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Engine
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Transmission

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Sprinter III

642

*

Sprinter III

651

*

Attachments
01.jpg:

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03.jpg:

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