Selective Catalytic Reduction (SCR) System; When Driving; Be careful not to allow the DEF to run out. If the DEF completely runs out, the SCR system will- Page 415

Selective Catalytic Reduction (SCR) System

*

The SCR system is designed to reduce nitrogen oxide (NOx) in the exhaust gas and purify
the exhaust gas by injecting it with Diesel Exhaust Fluid (DEF).

WARNING

Be careful not to allow the DEF to run out. If the DEF completely runs out, the SCR system will
not operate normally.

When the remaining DEF is low, a message is displayed on the multi-information display, and
the SCR warning light turns on/flashes.
Refer to Selective Catalytic Reduction (SCR) System Indications on page 4-259.
In this case, consult an Authorized Mazda Dealer. If DEF needs to be replenished, add DEF
following the specified procedure.
Refer to Diesel Exhaust Fluid (DEF) Replenishment on page 6-30.

NOTE



DEF needs to be replenished periodically according to the scheduled maintenance
information.



Normally, the vehicle can be driven about 12,000 km (7,500 miles) before the DEF needs
to be replenished. However, it may need to be replenished earlier depending on the
driving and environmental conditions (such as putting a high load on the engine while
driving or driving the vehicle at high altitudes).



The sound of the SCR system operating may be heard from the area under the vehicle,
however, this does not indicate a problem.

▼

Selective Catalytic Reduction (SCR) System Indications

As the remaining amount of Diesel Exhaust Fluid (DEF) lowers, the SCR system notifies
the driver using the following indications.
The vehicle speed may be restricted for a while even if the warning light turns off after
replenishing the DEF. To cancel the vehicle speed restriction immediately, switch the
ignition OFF after the warning light turns off and then switch the ignition ON again.

Status

Warning sound

SCR warn-

ing light

Multi-information

display indication

Driving restric-

tion

Remaining DEF has
decreased
(Maximum driving dis-
tance : 966 km (600
miles) or less)

Sound is activated when igni-
tion is switched ON

Turns off

None

When Driving

Selective Catalytic Reduction (SCR) System

*Some models.

4-259

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2020-6-2 16:33:11