Symptom List:
P 2066-MAS S AIR FLOW S EN SOR P LAU S IBILITY
P 2355-EGR F LOW RATE IS TOO HIGH
P 2355-EGR F LOW RATE IS TOO LOW
Te s t N o t e : Al l s y m p t o m s l i s t e d a b o v e a r e d i a g n o s e d u s i n g t h e s a m e t e s t s .
Th e title fo r th e te sts w ill be P 2066-MAS S AIR F LOW SENS OR
PLAUSIBILITY.
Wh e n Mo n i to re d a n d S e t Co n d it i o n :
P 2066-MASS AIR F LOW SEN SOR P LAU SIBILITY
Wh en Mon it or ed: Wit h t h e en gin e r u nn in g.
Set Condit ion : Th e ECM det ect s a r a tion a lit y pr oblem wit h th e MAF Sen sor or excessive
EGR flow.
POSSIBLE CAUSES
AIR FILTE R
AIR RE STRICTION
CH E CKING FOR AIR LE AKS
EGR ACTUATION - 1200 RP M
EGR VALVE
MAF SE NSOR
MAF SE NSOR RE ADIN G - 3OOO RP M
INTERMITTENT CONDITION
EGR RESTRICTION
TE S T ACTION AP PLICAB ILITY
1 NOTE: If the ECM detects and stores a DTC, the ECM also stores the
e n gi n e /ve h ic le o p e ra ti n g c o n d i tio n s u n d e r w h ic h th e D TC w a s s e t. S o m e o f
these conditions are displayed on the DRB at the same time the DTC is
displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to
duplicate these conditions may assist when checking for an active DTC.
Tur n th e ign it ion on .
Wit h th e DRB, er a se E CM DTCs.
Test drive th e veh icle an d m on it or t h e DRB for ECM DTCs.
Did t h is DTC set a ga in ?
All
Ye s → Go To 2
No → Go To 10
150
DRI V EABI LI T Y - DI ESEL
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