Volkswagen Passat 1995 Official Factory Repair Manual page 1619

Diagnostic Trouble Code (DTC) table
Scan Tool
Display
00525 2342
Heated Oxygen
sensor -G39
No signal
Short circuit to
positive
Short circuit to
ground
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Possible cause
G39 faulty
Oxygen sensor heating
faulty
Wiring open circuit
Short circuit to positive
in wiring or G39
Short circuit to ground
in wiring or G39
Fuel tank empty
Corrective steps
Replace G39, Page 24-9
Check Oxygen sensor heating relay (J278)
Page 01-44 , test step Fig. 5
Check wiring to G39
step 20
Fill tank / erase DTC memory
30
Page 6 of 23
01-12
, item 4
Page 01-47 , test
Page 01-
6/12/2004