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Self-diagnosis IV > < Self-diagnosis III

Octavia Mk1

Fault codes 17040 ... 18088
   
Fault codes 17040 ... 18088
Readout on -V.A.G 1552-Rectifying fault
17040
Fuel consumption signal		electrical fault in the circuit
–  Check the fuel consumption signal → Electrical System; Rep. Gr.01.
–  Check data BUS → Chapter 24-7.
17510
Bank 1 - probe 1, heating circuit		Short circuit to positive
–  Test lambda probe -G39- and lambda control upstream of catalytic converter → Chapter 24-4.
–  Test wiring and plug connections according to current flow diagram.
17511
Bank 1 - probe 1, heating circuit		Output too low
17513
Bank 1 - probe 2, heating circuit		Short circuit to positive
–  Test lambda probe -G130- and lambda control downstream of catalytic converter → Chapter 24-4.
–  Test wiring and plug connections according to current flow diagram.
17523
Bank 1 - probe 1, heating circuit		Short circuit to earth
–  Test lambda probe -G39- and lambda control upstream of catalytic converter → Chapter 24-4.
–  Test wiring and plug connections according to current flow diagram.
17524
Bank 1 - probe 1, heating circuit		Open circuit
17525
Bank 1 - probe 2, heating circuit		Short circuit to earth
–  Test lambda probe -G130- and lambda control downstream of catalytic converter → Chapter 24-4.
–  Test wiring and plug connections according to current flow diagram.
17526
Bank 1 - probe 2, heating circuit		Open circuit
17549
Load detection		implausible value
–  Inspecting air intake system for tightness (unmetered air) → Chapter 24-2.
–  Erase the fault memory and carry out test drive.
17579
TV drive angle sender 2 -G188		Implausible signal
–  Test throttle valve control unit -J338- → Chapter 24-5.
–  Adjust the throttle valve control unit → Chapter 24-6.
17580
TV drive angle sender 2 -G188		Signal too low
17581
TV drive angle sender 2 -G188		Signal too high
17584
Bank 1, lambda correction downstream of cat.		Regulating limit reached
–  Test lambda probe - G39- and lambda control upstream of catalytic converter → Chapter 24-4.
–  Test lambda probe -G130- and lambda control downstream of catalytic converter → Chapter 24-4.
–  Inspect intake air system for leaks (unmetered air) → Chapter 24-2.
17621
Injector cylinder 1 -N30		Short circuit to positive
–  Test resistance at injector (12...17 Ω at approx. 20° C).
–  Test wiring and plug connections according to current flow diagram.
17622
Injector cylinder 2 -N31		Short circuit to positive
17623
Injector cylinder 3 -N32		Short circuit to positive
17624
Injector cylinder 4 -N33		Short circuit to positive
17633
Injector cylinder 1 -N30		Short circuit to earth
–  Test resistance at injector (12...17 Ω at approx. 20° C).
–  Test wiring and plug connections according to current flow diagram.
17634
Injector cylinder 2 -N31		Short circuit to earth
17635
Injector cylinder 3 -N32		Short circuit to earth
17636
Injector cylinder 4 -N33		Short circuit to earth
17645
Injector cylinder 1 -N30		Open circuit
–  Test resistance at injector (12...17 Ω at approx. 20° C).
–  Test wiring and plug connections according to current flow diagram.
17646
Injector cylinder 2 -N31		Open circuit
17647
Injector cylinder 3 -N32		Open circuit
17648
Injector cylinder 4 -N33		Open circuit
17658
Fuel level		too low
–  Top up the fuel tank.
–  Test fuel gauge sender -G- → Electrical System; Rep. Gr.90.
17698
Coolant temperature sender -cooler outlet -G83		Signal too high → 1.6 ltr./75 kW Engine - Mechanical Components; Rep. Gr.19
17699
Coolant temperature sender -cooler outlet -G83		Signal too low → 1.6 ltr./75 kW Engine - Mechanical Components; Rep. Gr.19
17700
Thermostat for map-controlled engine cooling -F265		Open circuit → 1.6 ltr./75 kW Engine - Mechanical Components; Rep. Gr.19
17701
Thermostat for map-controlled engine cooling -F265		Short circuit to positive → 1.6 ltr./75 kW Engine - Mechanical Components; Rep. Gr.19
17702
Thermostat for map-controlled engine cooling -F265		Short circuit to earth → 1.6 ltr./75 kW Engine - Mechanical Components; Rep. Gr.19
17743
Engine torque monitoring 2		Regulating limit exceeded
–  Inspecting air intake system for tightness (unmetered air) → Chapter 24-2.
–  Inspect accelerator pedal position sender → Chapter 24-5.
17744
Engine torque monitoring		Regulating limit exceeded
17746
Bank1, camshaft position sensor => sender -G163		Open circuit/Short circuit to positive
–  Inspecting camshaft position sensor -G163- → Chapter 28-1.
–  Test wiring and plug connections according to current flow diagram.
17764
Ignition control cyl. 1		Short circuit to positive
–  Test power output stage -N122- → Chapter 28-1.
–  Test wiring and plug connections according to current flow diagram.
17765
Ignition control cyl. 1		Short circuit to earth
17767
Ignition control cyl. 2		Short circuit to positive
17768
Ignition control cyl. 2		Short circuit to earth
17794
Control unit defective		 
–  Replace engine control unit → Chapter 24-6.
17795
Control unit defective		 
17796
Control unit defective		 
17805
Rotor for engine speed		Adaption limit reached
–  Test resistance of sender (730...1000 Ω).
–  Inspect flywheel → 1.6 l/75 kW Engine, Mechanical Components; Rep. Gr.13.
17809
Exhaust gas recirculation valve -N18		Short circuit to earth
–  Test EGR valve -N18- in final control diagnosis → Chapter 01-1.
17810
Exhaust gas recirculation valve -N18		Short circuit to positive
17811
Exhaust gas recirculation system		Control difference
17818
Tank vent valve -N80		Short circuit to positive
–  Test solenoid valve 1 for activated charcoal filter system -N80- in final control diagnosis → Chapter 01-1.
17831
Bank 1, secondary air system		Flow rate too low
–  Test secondary air injection system → 1.6 l/75 kW Engine, Mechanical Components; Rep. Gr.26.
–  Inspect hoses and connection pipes to and between components → 1.6 l/75 kW Engine, Mechanical Components; Rep. Gr.26.
17832
Bank 1, secondary air system		Leak detected
17833
Tank vent valve -N80		Short circuit to earth
–  Perform actuator diagnosis → Chapter 01-1.
17834
Tank vent valve -N80		Open circuit
17835
Actuation of brake vacuum pump		Short circuit to positive
–  Perform actuator diagnosis → Chapter 01-1.
–  Test brake vacuum pump -V192- → Chapter 24-2.
17836
Actuation of brake vacuum pump		Short circuit to earth
17837
Actuation of brake vacuum pump		Open circuit
17842
Secondary air pump relay -J299		Short circuit to positive
–  Perform actuator diagnosis → Chapter 01-1.
17843
Secondary air pump relay -J299		Short circuit to earth
17848
Exhaust gas recirculation valve -N18		Open circuit
–  Perform actuator diagnosis → Chapter 01-1.
17850
EGR potentiometer -G212		Signal too high
–  Test wiring and plug connections according to current flow diagram.
17851
EGR potentiometer -G212		Signal too low
17909
Fuel pump relay -J17		Short circuit to earth
–  Perform actuator diagnosis → Chapter 01-1.
17910
Fuel pump relay -J17		Short circuit to positive
17911
Load signal for alternator terminal DF		Implausible signal
–  Test cable to alternator → Current flow diagrams and Fitting locations.
–  Inspecting AC generator → Current flow diagrams and Fitting locations.
17920
Variable intake manifold changeover valve -N156		Short circuit to positive
–  Perform actuator diagnosis → Chapter 01-1.
–  Test wiring and plug connections according to current flow diagram.
17923
Variable intake manifold changeover valve -N156		Short circuit to earth
17924
Variable intake manifold changeover valve -N156		Open circuit
17925
Main relay => -J217		electrical fault in the circuit
–  Check voltage supply relay -J363- → Current flow diagrams and Fitting locations.
17931
Crash signal from airbag CU		Implausible signal
–  Interrogate fault memory of airbag control unit and erase → Chapter 01-1.
–  Test airbag system → Body Work; Rep. Gr.01.
17950
TV drive angle sender -G187		Implausible signal
–  Test throttle valve control unit -J338- → Chapter 24-5.
–  Adjust the throttle valve control unit -J338- → Chapter 24-6.
17951
TV drive angle sender -G187		Signal too low
17952
TV drive angle sender -G187		Signal too high
17953
Throttle valve control		Malfunction
–  Test throttle valve control unit -J338- → Chapter 24-5.
–  Adjust the throttle valve control unit -J338- → Chapter 24-6.
17966
Throttle valve drive -G186		electrical fault in the circuit
17967
Throttle valve control unit -J338		Incorrect basic setting
17972
Throttle valve control unit -J338		Undervoltage on basic setting
–  Test throttle valve control unit -J338- → Chapter 24-5.
–  Test battery, charge if necessary → Electrical System; Rep. Gr.27.
17973
Throttle valve control unit -J338		Bottom limit not reached
–  Check throttle valve for damage or dirt.
–  Test throttle valve control unit -J338- → Chapter 24-5.
17976
Throttle valve control unit -J338		Mechanical fault
17977
Cruise control system switch -E45		Implausible signal
–  Read measured value block, display group 066 → Chapter 01-5.
17978
Engine control unit blocked		 
–  Adjust the engine control unit to the electronic immobiliser → Electrical System; Rep. Gr.96.
–  Test electronic immobiliser → Electrical System; Rep. Gr.96.

1)  When attempting to start with a non-adapted key a static fault is stored in the memory. If a subsequent start attempt occurs with an adpated key the fault is changed to a sporadic fault.
   
Readout on -V.A.G 1552-Rectifying fault
17987
Throttle valve control unit -J338		Adaption not started
–  Inspect plug assignment on the throttle valve control unit -J338- → Current flow diagrams and Fitting locations.
–  Adjust the throttle valve control unit → Chapter 24-6.
–  Test throttle valve control unit -J338- → Chapter 24-5.
17997
Potentiometer for temperature selector -G267 → Note		Short circuit to earth
–  Test wiring between engine control unit and potentiometer for short circuit to earth and to positive according to current flow diagram → Current flow diagrams and Fitting locations.
–  Test potentiometer for temperature selector → Heating, Air Conditioning; Rep. Gr.87.
17998
Potentiometer for temperature selector -G267 → Note		Open circuit
18010
Voltage supply tml. 30		Voltage too low
–  Check charge state of battery → Electrical System; Rep. Gr.27.
–  Inspect AC generator → Current flow diagrams and Fitting locations.
–  Remove line interruption according to Current Flow Diagram → Current flow diagrams and Fitting locations.
18011
Control unit defective		 
–  Replace engine control unit → Chapter 24-6.
18016
Steering angle signal → Note		Fault message from steering angle sender
–  Read measured value block, display group 055, check readouts in display field 4 → Chapter 01-5.

2)  These faults apply only to vehicles with heating system or manual air conditioning. If these faults are displayed on vehicles fitted with Climatronic, please check the coding of the engine control unit → Chapter 24-6.
3)  Fault in control unit software, what is meant is the PAS pressure switch -F88-
   
Readout on -V.A.G 1552-Rectifying fault
18017
Crash disconnect activated		 
–  Interrogate fault memory of engine control unit and erase → Chapter 01-1.
–  Test airbag system → Body Work; Rep. Gr.01.
18020
Engine control unit incorrectly coded		 
–  Code engine control unit → Chapter 24-6.
18033
Databus drive		implausible message from gearbox ECU
–  Interrogate fault memory of automatic gearbox control unit → Automatic Gearbox; Rep. Gr.01.
–  Check coding → Chapter 24-6.
–  Check data BUS → Chapter 24-7.
18034
Drive databus		Missing message from gearbox CU
18038
Accelerator pedal position sender -G79		Signal too low
–  Inspect accelerator pedal position sender → Chapter 24-5.
18039
Accelerator pedal position sender -G79		Signal too high
18041
Accelerator pedal position sender -2 -G185		Signal too low
–  Inspect accelerator pedal position sender → Chapter 24-5.
18042
Accelerator pedal position sender -2 -G185		Signal too high
18044
Databus drive		Missing message from airbag CU
–  Check data BUS → Chapter 24-7.
–  Test airbag control unit → Body work; Rep. Gr.01.
18047
1/2 for accelerator pedal position sender -G79+G185		Implausible signal
–  Inspect accelerator pedal position sender → Chapter 24-5.
18048
Control unit defective		 
–  Replace engine control unit → Chapter 24-6.
18056
Databus drive		defective
–  Check data BUS → Chapter 24-7.
18057
Databus drive		Missing message from ABS CU
–  Check data BUS → Chapter 24-7.
–  Inspecting ABS control unit -J104- → Running Gear; Rep. Gr.45.
18058
Databus drive		Missing message from combiinstrument
–  Check data BUS → Chapter 24-7.
–  Test dash panel insert → Electrical System; Rep. Gr.90.
18065
Air conditioning system inlet/outlet		Short circuit to positive
–  Read measured value block, display group 050 → Chapter 01-5.
18067
Radiator fan control 1		Short circuit to positive
–  Perform actuator diagnosis → Chapter 01-1.
–  Test cables for short circuit to positive or earth → Current flow diagrams and Fitting locations.
18068
Radiator fan control 1		Short circuit to earth
18069
Radiator fan control 2		Short circuit to positive
–  Perform actuator diagnosis → Chapter 01-1.
–  Test cables for short circuit to positive or earth → Current flow diagrams and Fitting locations.
18070
Radiator fan control 2		Short circuit to earth
18085
Fault lamp for electrical accelerator control - K132		Short circuit to positive
–  Test EPC fault lamp -K132- → Chapter 24-5.
18088
Non-resetable emergency running mode active		 
–  Test throttle valve control unit -J338- → Chapter 24-5.
–  Inspect accelerator pedal position sender → Chapter 24-5.

   

Self-diagnosis IV > < Self-diagnosis III