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Self-diagnosis IV > < Self-diagnosis III

Octavia Mk1

Fault codes 17510 ... 18261
   
Fault codes 17510 ... 18261
  Note
t  The fault table is arranged according to the 5-digit fault code on the left.
t  Explanations regarding fault types (e.g. “open circuit or short-circuit to earth”) → Operating instructions for the vehicle system tester.
t  If parts are output as faulty: First of all, test all the leads and plug connections to these components as well as the earth cables of the system according to the current flow diagram. Replace the component only if this test does not reveal any fault. This applies in particular if the fault is shown as sporadic (SP).
t  When testing the earth leads, remove open circuit in wiring or short circuit according to current flow diagram → Current flow diagrams and Fitting locations.
  Note
t  16497 = Fault denomination
t  Intake air temperature sender -G42- = current path or fault point defective
t  Signal too small = designates fault type as text
t  sporadically occurring fault = fault which does not occur often, e.g. loose contact
t  When testing senders, injection valves and other components of the injection system → Current flow diagrams and Fitting locations.
Readout on -V.A.G 1552-Rectifying fault
17510
Bank 1 - probe 1, heating circuit		Short circuit to positive
–  Test lambda probe heating before catalyst → Chapter
–  Remove short-circuit according to Current Flow Diagram
17513
Bank 1 - probe 2, heating circuit		Short circuit to positive
–  Test lambda probe heating after catalyst → Chapter
17519
Lambda control (bank 1)		System too lean
–  Testing lambda probe and lambda control upstream of catalytic converter → Chapter
17520
Lambda control (bank 1)		System too rich
17521
Bank 1, probe 1		Inner resistance too great
–  Test lambda probe heating before catalyst → Chapter
17522
Bank 1, probe 2		Inner resistance too great
–  Test lambda probe heating after catalyst → Chapter
17523
Bank 1 - probe 1, heating circuit		Short circuit to earth
–  Test lambda probe heating before catalyst → Chapter
17524
Bank 1 - probe 1, heating circuit		Open circuit
17525
Bank 1 - probe 2, heating circuit		Short circuit to earth
–  Test lambda probe heating after catalyst → Chapter
17526
Bank 1 - probe 2, heating circuit		Open circuit
17535
Bank 1, mixture adaptation (mult.)		System too rich
–  Test fuel pressure regulator and system pressure → Chapter
–  Testing injection valves → Chapter
–  -N80- test → Chapter
17536
Bank 1, mixture adaptation (mult.)		System too rich
–  Test fuel pressure regulator and system pressure → Chapter
–  Testing injection valves → Chapter
–  Test fuel pump → 1.4 ltr./55 Engine, Mechanical Components; Rep. Gr.20
–  Inspect intake system for leaks → Chapter
–  Inspect exhaust system for leaks → 1.4 ltr./55 kW Engine, Mechanical Components; Rep. Gr.20
–  Inspect vacuum lines for leaks
17544
Bank 1, mixture adaptation (add.)		System too rich
17545
Bank 1, mixture adaptation (add.)		System too rich
–  Test fuel pressure regulator and system pressure → Chapter
–  Testing injection valves → Chapter
–  -N80- test → Chapter
17557
Lambda control (bank 1)		implausible control value
–  Testing lambda probe and lambda control upstream of catalytic converter → Chapter
 
17559
Bank 1, mixture adaptation range 1		Below leanness limit
–  Test fuel pressure regulator and system pressure → Chapter
–  Testing injection valves → Chapter
–  Test fuel pump → 1.4 ltr./55 Engine, Mechanical Components; Rep. Gr.20
–  Inspect intake system for leaks → Chapter
–  Inspect exhaust system for leaks → 1.4 ltr./55 kW Engine, Mechanical Components; Rep. Gr.26
–  Test EGR system → 1.4 ltr./55 Engine, Mechanical Components; Rep. Gr.26
–  Check tank ventilation system for tightness
–  Testing lambda probe and lambda control upstream of catalytic converter → Chapter
–  Testing lambda probe and lambda control downstream of catalytic converter → Chapter
17560
Bank 2, mixture adaptation range 2		Below leanness limit
17563
Intake manifold pressure sender -G71-		Short circuit to positive
–  Test sender -G71-
–  Inspect intake system for leaks → Chapter
 
17564
Intake manifold pressure sender -G71-		Open circuit/Short-circuit to earth
17565
Intake manifold pressure sender -G71-		Supply voltage
17566
Intake manifold pressure sender -G71-		Implausible signal
17573
Bank 1, mixture adaptation range 1		Above richness limit
–  Test fuel pressure regulator and system pressure → Chapter
–  Testing injection valves → Chapter
–  Test fuel pump → 1.4 ltr./55 Engine, Mechanical Components; Rep. Gr.20
–  Inspect intake system for leaks → Chapter
–  Inspect exhaust system for leaks → 1.4 ltr./55 kW Engine, Mechanical Components; Rep. Gr.26
–  Test EGR system → 1.4 ltr./55 Engine, Mechanical Components; Rep. Gr.26
–  Check tank ventilation system for tightness
–  Testing lambda probe and lambda control upstream of catalytic converter → Chapter
–  Testing lambda probe and lambda control downstream of catalytic converter → Chapter
17574
Bank 1, mixture adaptation range 2		Above richness limit
17579
Angle sender 2 for throttle valve drive -G188-		Implausible signal
–  Inspecting throttle valve control unit → Chapter
 
17580
Angle sender 2 for throttle valve drive -G188-		Signal too low
 
17581
Angle sender 2 for throttle valve drive -G188-		Signal too high
17584
Bank 1 lambda correction after catalyst		Regulating limit reached
–  Testing lambda probe ageing upstream of catalytic converter
–  Testing lambda probe and lambda control downstream of catalytic converter → Chapter
 
17604
Bank 1 - probe 1, heating circuit		Electrical fault
–  Test lambda probe heating before catalyst → Chapter
 
17606
Bank 1 - probe 2, heating circuit		Electrical fault
–  Test lambda probe heating after catalyst → Chapter
17609
Injection valve for cylinder 1 -N30-		Electrical fault in the circuit
–  Testing injection valves
 
17610
Injection valve for cylinder 2 -N31-		Electrical fault in the circuit
 
17611
Injection valve for cylinder 3 -N32-		Electrical fault in the circuit
17612
Injection valve for cylinder 4 -N33-		Electrical fault in the circuit
17621
Injection valve for cylinder 1 -N30-		Short circuit to positive
–  Testing injection valves
17622
Injection valve for cylinder 2 -N31-		Short circuit to positive
17623
Injection valve for cylinder 3 -N32-		Short circuit to positive
17624
Injection valve for cylinder 4 -N33-		Short circuit to positive
17633
Injection valve for cylinder 1 -N30-		Short circuit to earth
–  Testing injection valves
17634
Injection valve for cylinder 2 -N31-		Short circuit to earth
17635
Injection valve for cylinder 3 -N32-		Short circuit to earth
17636
Injection valve for cylinder 4 -N33-		Short circuit to earth
17645
Injection valve for cylinder 1 -N30-		Open circuit
–  Testing injection valves
17646
Injection valve for cylinder 2 -N31-		Open circuit
17647
Injection valve for cylinder 3 -N32-		Open circuit
17648
Injection valve for cylinder 4 -N33-		Open circuit
17658
Fuel level		too low
–  Top up the fuel tank
17733
Knock control cyl. 1		Regulating limit reached
–  Change type of fuel
–  Testing knock sensor
–  Eliminate abnormal engine running noises (loose ancillaries, bracket or bolt bent)
–  Check wiring and plug connections according to the current flow diagram
–  Slacken knock sensor and then tighten again to 20 Nm
17734
Knock control cyl. 2		Regulating limit reached
17735
Knock control cyl. 3		Regulating limit reached
17736
Knock control cyl. 4		Regulating limit reached
17745
Bank 1, camshaft position sensor -G163- ⇒		Short circuit to earth
–  Testing hall sender → Chapter
17746
Bank 1, camshaft position sensor -G163- ⇒		Open circuit/Short circuit to positive
17748
Camshaft pos./crankshaft pos. sensor		Incorrect assignment
–  Test sender -G28 -
–  Testing hall sender → Chapter
 
17749
Ignition outlet 1		Short circuit to earth
–  Test ignition transformer
17751
Ignition outlet 2		Short circuit to earth
17794
17795
17796
control unit defective		 
–  Test earth cables according to current flow diagram
–  Replacing engine control unit → Chapter
17801
Ignition outlet 1		Electrical fault in the circuit
–  Test ignition transformer
17802
Ignition outlet 2		Electrical fault in the circuit
17808
Exhaust gas return valve -N18-		Electrical fault in the circuit
–  Check valve -N80- → Chapter
17809
Exhaust gas return valve -N18-		Short circuit to earth
17810
Exhaust gas return valve -N18-		Short circuit to positive
17811
Exhaust gas recirculation system		Control difference
17812
Exhaust gas recirculation system		Basic setting not performed
17817
Tank ventilation valve -N80-		Electrical fault in the circuit
17818
Tank ventilation valve -N80-		Short circuit to positive
17833
Tank ventilation valve -N80-		Short circuit to earth
17834
Tank ventilation valve -N80-		Open circuit
–  Check valve -N80- → Chapter
–  Test fuse 43
17847
Potentiometer for exhaust gas recirculation -G212-		Incorrect basic setting
–  Check valve -N18- → Chapter
17848
Exhaust gas return valve -N18-		Open circuit
–  Check valve -N18- → Chapter
17850
Potentiometer for exhaust gas recirculation -G212-		Signal too high
17851
Potentiometer for exhaust gas recirculation -G212-		Signal too low
17852
Potentiometer for exhaust gas recirculation -G212-		Implausible signal
17908
Fuel pump relay -J17-		Electrical fault in the circuit
–  Check -J17 -
17909
Fuel pump relay -J17-		Short circuit to earth
17910
Fuel pump relay -J17-		Short circuit to positive
17931
Crash signal from airbag CU		Implausible signal
–  Test airbag → Body Fitting Work; Rep. Gr.01
17947
Clutch pedal switch -F36-		Implausible signal
–  Testing switch -F36-
17949
Fuel pump relay -J17-		Open circuit
–  Testing relay -J17-
17950
Angle sender for throttle valve drive -G187- → Note		Implausible signal
–  Inspecting throttle valve control unit → Chapter
–  Replacing engine control unit -J220- → Chapter
17951
Angle sender for throttle valve drive -G187- → Note		Signal too low
–  Inspecting throttle valve control unit → Chapter
17952
Angle sender for throttle valve drive -G187- → Note		Signal too high
17953
Throttle valve control		Malfunction
17966
Throttle valve drive -G186- → Note		Electrical fault in the circuit
17967
Throttle valve control unit -J338-		Incorrect basic setting
–  Adapt the engine control unit to the throttle valve control unit → Chapter
17968
Maximum engine speed exceeded		 
–  Inspect engine for mechanical damage and erase fault memory → Chapter
17972
Throttle valve control unit -J338-		Voltage drop on basic setting
–  Check battery voltage if necessary recharge
–  Adapt the engine control unit to the throttle valve control unit → Chapter
17973
Throttle valve control unit -J338-		Bottom limit not reached
–  Inspect throttle valve for damage and dirt
–  Inspecting throttle valve control unit → Chapter
17976
Throttle valve control unit -J338-		Mechanical fault
17977
CCS switch -E45-		Implausible signal
–  Testing cruise control system
–  Analysing measured value block 66 → Chapter
17978
Engine control unit inhibited		 
–  Adapt engine control unit to electronic immobiliser → Electrical System; Rep. Gr.96.
–  Test immobiliser → Electrical System; Rep. Gr.96
17987
Throttle valve control unit -J338-		Adaption not started
–  Adapt the engine control unit to the throttle valve control unit → Chapter
–  Inspecting throttle valve control unit → Chapter
18008
Voltage supply tml. 15		Voltage too low
–  Check the supply voltage of the engine control unit → Chapter
–  Perform procedure if voltage supply interrupted → Chapter
–  Test fuse
18010
Voltage supply tml. 30		Voltage too low
18011
18012
Control unit defective		 
–  Replacing engine control unit -J220- → Chapter
18017
Crash disconnect activated		 
–  Test airbag system → Body Work; Rep. Gr.01
18018
Control unit defective		 
–  Test earth cables according to current flow diagram
–  Replacing engine control unit → Chapter
18034
Databus drive		Missing message from gearbox CU
–  Test data bus → Chapter
18038
Accelerator pedal position sender -G79-		Signal too low
–  Test sender -G79 -
18039
Accelerator pedal position sender -G79-		Signal too high
18041
Accelerator pedal position sender 2 -G185-		Signal too high
–  Test sender - G185-
18042
Accelerator pedal position sender 2 -G185 -		Signal too high
18044
Databus drive		Missing message from airbag CU
–  Test data bus → Chapter
–  Test airbag control unit → Body Work; Rep. Gr.01
18047
Accelerator pedal position sender 1/2
-G79+G185-		Implausible signal
–  Check accelerator pedal position sender
18048
Control unit defective		 
–  Replacing engine control unit -J220- → Chapter
–  Test earth cables according to current flow diagram
18056
Databus drive		defective
–  Test databus lines → Chapter
18057
Databus drive		Missing message from ABS CU
18058
Databus drive		Missing message from combiinstrument
18062
Please read out contents of fault memory		of combiinstrument
–  Perform self-diagnosis of combiinstrument control unit → Electrical System; Rep. Gr.90
18084
Fault lamp for electr. accelerator control -K132-		Electrical fault in the circuit
–  Inspecting fault lamp for EPC → Chapter
18085
Fault lamp for electr. accelerator control -K132-		Short circuit to positive
18086
Fault lamp for electr. accelerator control -K132-		Short circuit to earth
18087
Fault lamp for electr. accelerator control -K132-		Open circuit
18090
Databus drive		Missing message from ABS CU
–  Test data bus → Chapter
18261
Databus drive		implausible message from ABS CU
–  Test data bus → Chapter
–  Inspecting ABS control unit → Running gear; Rep. Gr.45

1)  Angle sensor -1- for throttle valve drive (electronic power control) -G187- is also known as throttle valve position sender -G127-.
2)  Throttle valve drive (electronic power control) -G186- is also known as throttle valve positioner (for intake manifold) -V60-.
  Note
t  Regarding fault code 17978:
t  The immobilizer control unit is located in the dash panel insert and therefore must not be replaced individually.
t  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.
   

Self-diagnosis IV > < Self-diagnosis III