Fault Code: 00257/P0101 - Volkswagen CJDA Workshop Manual

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
3.2 Fault code: 00257/P0101...01687/P0697
Indicated on display
00257/P0101
Air mass meter -G70-
Implausible signal
00258/P0102
Air mass meter -G70-
Signal too low
00259/P0103
Air mass meter -G70-
Signal too large
00260/P0104
Air mass meter -G70-
34 Repair Group 01 - Vehicle self-diagnosis
Possible cause of fault Possible effects
◆ Open circuit or line
short-circuit
◆ -G70- defective
◆ Open circuit or line
short-circuit
◆ -G70- defective
◆ Open circuit or line
short-circuit
◆ -G70- defective
◆ EGR is switched off.
Diesel particulate filter
regeneration sup-
pressed
◆ Driving dynamics im-
paired
◆ Fumes generated
◆ No regeneration
◆ EGR is switched off.
Diesel particulate filter
regeneration sup-
pressed
◆ Driving dynamics not
or barely impaired,
because a good alter-
native value is used.
Possible breakdown
due to full DPF (con-
sequential fault)
◆ EGR is switched off.
Diesel particulate filter
regeneration sup-
pressed
◆ Driving dynamics not
or barely impaired,
because a good alter-
native value is used.
Possible breakdown
due to full DPF (con-
sequential fault)
Fault remedy
– -G70- Check.
⇒ P age 411
– Check whether there
is an electrical fault in
wire or wiring harness
(short to positive or to
earth, or open circuit).
If not ⇒ renew sensor
– -G70- Check.
⇒ P age 411
– Check whether there
is an electrical fault in
wire or wiring harness
(short to positive or to
earth, or open circuit).
If not ⇒ renew sensor
– After road test fault in
event memory ⇒ re-
new ECU (there is no
other way to test the
air mass meter,
maybe with a frequen-
cy generator)
– -G70- Check.
⇒ P age 411
– Check whether there
is an electrical fault in
wire or wiring harness
(short to positive or to
earth, or open circuit).
If not ⇒ renew sensor
– After road test fault in
event memory ⇒ re-
new ECU (there is no
other way to test the
air mass meter,
maybe with a frequen-
cy generator)