05theF engine
A
Specifically,
we
have
had
instances
wherenot
DTC’s
P0101
P1109 of
had
been
the car
1to set
22
8
4
7
conditioning
system
should
be
switched
on
and
the
engine
speed
(revs),
limited
2,000
rpm
for
the
covered into the dealer, only for them to find that the original equipment engine air intake filter had been
first
2-minutes
engine start-up.
substituted
for after
a non-approved
after-market type (applicable to both dry and oil coated
71 types). Whilst
64is no performance advantage
these filters may alter the induction noise, our testing has concluded there
This
will ensure
that
refrigerantairgas
and
around
the air
conditioning
preD
achieved
by fitting
anthe
aftermarket
filter
of oil
thisfully
typecirculate
on a Lotus
vehicle.
In fact,
fitment ofsystem,
B
1 such filters
6
venting
potential
damage
or
premature
wear
of
the
air
conditioning
pump.
may cause some of the issues as listed below:

01
12

CLASS 4

21
Service Manager
Service Reception
Supervisor
Parts Manager
32
2 new procedure is to confirm the air conditioning system is cooling sufficiently prior
2
The
purpose
of
this
[Text
here].
[Text
here].
TITLE:
to
the new owner receiving the vehicle.
TITLE:
Any unauthorised modifications, including fitment of non-approved after-market air filter resulting in
[Next
para
Revisions
to spacing]
thespacing]
Elise engine cooling, heating and air conditioning systems.
[Next
generation
of diagnostic
troublefrom
codes
P0101 &
P1109.
This
form para
can
be downloaded
the(DTC’s)
Lotus Dealer
Portal,
from the home page go to: Aftersales>
Aftersales Service Forms>PDI
Forms
&
Handover
Checklists.
8
REASON:
Yours
sincerely
/ Kind
regards,
(Delete
as as
appropriate)
Yours
sincerely
/ Kind
regards,
(Delete
appropriate)
SUMMARY:
92
As a production running change, revisions have been implemented to the engine cooling and HVAC
Dealers
are reminded
of existing
Lotus Warranty Policy (extract from policy and procedures manual):
Item
4: Update
to Owners
Handbooks
(Heating, Ventilation and Air Conditioning) systems fitted to both the Elise Sport 220 and Elise Cup 25003
The
vehicle
storage
informationLotus
shown in the handbooks for current production vehicles will be amend“Under
normal
3 May
5circumstances,
models
built from
2019 onwards.will not accept responsibility for part failures caused as a result of
ed
for
the
next
print
run
to
include
important information when initially staring a vehicle fitted with air
any of the following conditions:3
[Name]
–
[Title]
3
conditioning
after
long
term
storage,
extract below:
[Name]
– [Title]
6 12
-LOTUS
The
vehicle
been
away from the manufacturer’s specification.
First
VIN’s
fitted has
with
revisedaltered
systems:
CARS
LIMITED
LOTUS
CARS
LIMITED
Right hand drive: SCCLJCRC8LHC10071
T +44
(0)1953
[######]
M +44
(0)[####
######]
‘Air
Conditioning
(If
Fitted)
The
owners
handbook
also contains
aasimilar
statement:
5(0)[####
+44
(0)1953
[######]
M +44
######]
91
LeftThand
drive:
SCCLJCRC9LHD10079
Prior
To
Storage
[name]@lotuscars.com
- “Parts
Not Approved by Lotus - Any Lotus part affected or damaged
[name]@lotuscars.com
a7by the fitment of a non-approved
The
airwill
conditioning
system
be in good
order and
charged.
part
not be covered
byshould
this warranty
and working
may invalidate
the fully
complete
vehicle warranty.”

7

41

Air
conditioning
proven tothe
beaftermarket
caused by insufficient
refrigerant
circulation
asthis
a result
- Part
load fuel failures/damage
learns differed between
and standard
air filter,oiland
although
was
1
of not
excessive
engine
revving
during
initial
engine
start-up
after
long
periods
of
vehicle
storage/inactivity
an issue with use on the dynamometer, there could be an increased risk of MIL events and fault
willcodes
not be
covered
the New
Vehicle Warranty.’
being
set inbynormal
use.
uA the oil used onEmany aftermarket filters
- Contamination of the MAF (Mass Airflow Flow) sensor
otfrom
Important for Dealer:
was found and this will likely impact the reliability and accuracy of the MAF sensor
readings over time.
F in long
The information B1
above is also just 1as relevant for any vehicles that you have
term storage as

a
- Trace
oil build
up on the MAF
94 from an aftermarket air filter may impact emissions.

well
as dealer
stock.



- Potential risk of MAF sensor reliability.



It
take several
months forcompliance
this new information
toGbe
included
in thechange
next handbook
print run,
there-if
- may
Potential
risk of emissions
issues, any
MAF
or fuelling
could impact
IUPRM,
fore,
from
the
date
of
this
bulletin
release,
when
handing
over
any
new
vehicle,
please
ensure
that
the
diagnostics are not completed as required.
vehicle owner is made aware of this information.
Major revisions include:
In the
event
of the
actual
reading
being
this can
impact
on many
A.
New
radiator
with
the MAF
engine
coolant
fansincorrect,
repositioned
to the
top (fan
bladefunctions:
orientation altered to
Item 5: Warranty Pre-Authorisation Request Form
- Potential
MAF, MAF
to TPS correlation
issues, fault code & MIL events.
draw air of
through
from to
theMAP
baseorofMAF
the coolant
pack).
A new form was issued on 13/08/2020 which included a new section to be completed specifically for air
B.
Heater
water
circuit simplified
and is now through
the same
as the Evora
400
and later Exige models with
- MAF
errors
impacting
engine
performance,
incorrect
fuelling
& ignition.
conditioning
issues.
Please
ensure
that this section is completed
in full for
any potential air conditioning
the
hot
water
feed
to
the
heater
unit
being
supplied
from
a
bleed-off
pipe
from the engine to radiator
- MAF errors leading
to false
of many
fault codes.
component/gas
recharging
astriggering
this may, in
instances, assist Lotus in determining the initial cause
main coolant pipe. The heater coolant feed pipe is now deleted from the right hand side of the side
of
air is
conditioning
failure.
MAF
alsorail,
theonly
main
input
used
in (B1),
the calculation
of torque. In the event of torque being in error, any
chassis
the
return
pipe
is still used.
function
thatofuses
torque
will also
be in
error,
such
automatic fittings.
transmission shift learns because:
C.
Fitment
Exige
condenser
using
PAD
type
pipeasconnection
CHARGES:
D.
Fitment ofshift
Evora
receiver
drier
withbands
PAD type
pipe 2connection
fittings.
-NoAutomatic
learns
are
in
torque
between
and
209
Nm.
warranty charges are associated with the contents of this bulletin.
E.
Revised
service
ports
within
the
right
hand
rear
wheelarch
area
connections).
- If the transmission sees a steady MAF reading that equates to (again
66, 85,using
126,PAD
167 type
or 209
Nm it may
F. schedule
New air aconditioning
bodyside
pipes
with
PAD
connection
fittings
replacing
the
original
nut
clutch or brake learn, if however this is not actually 66, 85, 126, 167 or 209 Nm union
(due
to
a
Ends.
type
fittings.
MAF error), the learn for that torque band will be incorrect and shift quality will be adversely affected.
G. Revision to coolant circuit/hoses in engine bay for updated water heater return circuit.

Continued..
Continued..