Volkswagen Golf / Golf GTI / Golf Variant. Manual - part 171
DTC /
Descrip‐
tion
Monitor
Strategy
Descrip‐
tion
Malfunction Crite‐
ria and Threshold
Value
Secondary Parame‐
ters with Enable
Conditions
Monitor‐
ing Time
Length
MIL Il‐
lum.
Component Diag‐
nostic Procedure
P2237
O2 Sen‐
sor Pos‐
itive
Current
Control
Circuit/
Open
Bank 1
Sensor
1
Oxygen
Sensors
Front
Open Cir‐
cuit
Pump
Voltage
(VIP)
• Diff. pump volt‐
age (VIP) vs.
virtual ground
voltage (VG)
<= 1.20 V
• Diff. nernst
voltage (VN)
vs. virtual
ground voltage
(VG) <= 1.20 V
• And
• Choice of:
• Nernst voltage
(VN) > 4.40 V
• Or
• Diff. pump volt‐
age (VIP) vs.
virtual ground
voltage (VG) >
2.35 V
• Diff. pump volt‐
age (VIP) vs.
virtual ground
voltage (VG) <
-2.35 V
• Or
• Diff. nernst
voltage (VN)
vs. virtual
ground voltage
(VG) > 1.60 V
• Diff. nernst
voltage (VN)
vs. virtual
ground voltage
(VG) < -0.10 V
• Or
• Pump current
driver stage in‐
ternal value
• Or
• Measurement
WRAF sensor
label resistor >
n.a. Ohm
• O2S front (linear)
ready
• O2S ceramic
temperature >
785° C
• For time >= 10.0 s
• 2.3 s
• Con‐
tinu‐
ous
• 2
DCY
– Check the Oxy‐
gen Sensor 1
Before Catalytic
Converter -
GX10- . Refer to
.
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
3. Diagnosis and Testing
357