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Self-diagnosis III > < Self-diagnosis II

Octavia Mk1

Fault table, fault codes 16395...17768
Fault table, fault codes 16395...17768
  Note
t  The fault source table is ordered according to the 5-digit fault code on the left.
t  Explanations concerning the types of faults (e.g. Interruption or short-circuit to earth): → Operating instructions of the vehicle system tester
t  If parts are output as faulty: First of all, test all the cables and plug connections to these components as well as the earth cables of the system according to the current flow diagram. Replace component only if these tests do not reveal any fault. This applies in particular if the fault is shown as sporadic (SP).
t  When testing senders and other components of the fuel injection system and when testing electric cables, proceed according to appropriate current flow diagram → Current flow diagrams and Fitting locations
  Note
t  16486 = Fault denomination
t  air mass meter -G70- = current path or fault point defective
t  Signal too small = designate fault type with text
t  sporadically occurring fault = fault which does not occur often, e.g. loose contact
   
Readout on -V.A.G 1552- Rectifying fault
16395
Bench2, camshaft adjustment		Malfunction
–  Test camshaft adjustment → Chap. 01-1, Final control diagnosis
16396
Bench2, camshaft adjustment		Malfunction
–  Test camshaft adjustment → Chap. 01-1, Final control diagnosis
16485
Air mass meter -G70-		Implausible signal
–  Check sender -G70- in measured value block, display group 002
 
–  Check wiring to sender -G70- → Current flow diagrams and Fitting locations
16486
Air mass meter -G70-		Signal too low
–  Replace air filter element
–  Check sender -G70- in measured value block, display group 002
–  Check wiring to sender -G70- → Current flow diagrams and Fitting locations
 
16487
Air mass meter -G70-		Signal too high
 
 
 
16490
Intake manifold pressure/air pressure ⇒
-G71-/-F96-		Implausible signal
–  Check sender and wiring to charge pressure sender -G31- → Current flow diagrams and Fitting locations
16496
Intake manifold temperature sender -G42-		Signal too low
–  Check sender -G42- in measured value block, display group 004
–  Test sender resistance -G42- → Chap. 24-1
 
 
16497
Intake manifold temperature sender -G42-		Signal too high
 
 
16500
Coolant temperature sender -G62-		Implausible signal
–  Check sender -G62- in measured value block, display group 004
–  Test sender resistance -G62- → Chap. 24-1
–  Check coolant regulator → 1,8 l/132 kW Engine, Mechanical Components; Rep. Gr.19
16501
Coolant temperature sender -G62-		Signal too low
 
 
16502
Coolant temperature sender -G62-		Signal too high
 
 
 
16514
Bench1-Probe 1		Electrical fault in the circuit
–  Test lambda probe -G39- and lambda control upstream of catalytic converter → Chapter 24-3
 
 
16515
Bench1-Probe 1		Voltage too low
 
 
16516
Bench1-Probe 1		Voltage too large
16517
Bench1-Probe 1		Signal too slow
16518
Bench1-Probe 1		No activity
16519
Bank1, probe1 heating circuit		Electrical fault
16520
Bench1-Probe 2		Electrical fault in the circuit
–  Test lambda probe -G130 - and lambda control downstream of catalytic converter → Chapter 24-3
16521
Bench1-Probe 2		Voltage too low
16522
Bench1-Probe 2		Voltage too large
16523
Bench1-Probe 2		Signal too slow
16524
Bench1-Probe 2		No activity
16620
Charge pressure sender -G31-		Implausible signal
–  Check sender and wiring to charge pressure sender -G31- → Current flow diagrams and Fitting locations
16621
Charge pressure sender -G31-		Signal too low
16622
Charge pressure sender -G31-		Signal too high
16684Combustion misfiring detected
–  Check combustion misfiring in measured value block, display group 014, 015 and 016
–  Fill up with fuel and check holding pressure → Chap. 24-2
–  Test injectors → Chapter 01-1, Final control diagnosis
–  Test injected quantity and tightness → Chapter 24-2
–  Test ignition cables and spark plugs
–  Test ignition coil → Current flow diagrams and Fitting locations
16685
Cyl. 1		Combustion misfiring detected
16686
Cyl. 2		Combustion misfiring detected
16687
Cyl. 3		Combustion misfiring detected
16688
Cyl. 4		Combustion misfiring detected
16705
Engine speed sender -G28-		Implausible signal
–  Test resistance of engine speed sender -G28- → Chap. 24-1
–  Check wiring to sender -G28- → Current flow diagrams and Fitting locations
16706
Engine speed sender -G28-		No signal
 
 
16711
Knock sensor 1 -G61-		Signal too low
–  Check knock sensor in measured value block, display group 020
–  Check wiring to knock sensor → Current flow diagrams and Fitting locations
–  Slacken knock sensor and tighten again to 20 Nm tightening torque
 
16712
Knock sensor 1 - G61-		Signal too high
16716
Knock sensor 2 -G66-		Signal too low
 
16717
Knock sensor 2 - G66-		Signal too high
16725
Camshaft position sensor ⇒ sender -G40-		Implausible signal
–  Test camshaft position sensor → Chap. 28-1
16726
Camshaft position sensor ⇒ sender -G40-		Signal too low
16727
Camshaft position sensor ⇒ sender -G40-		Signal too high
16795
Secondary air system		Flow faulty
–  Test secondary air injector -N112- → Chap. 01-1, Final control diagnosis
–  Inspecting air intake system for tightness (unmetered air) → Chap. 24-2
–  Test relay -J299- → Chap. 01-1, final control diagnosis
–  Test secondary air pump
–  Testing combination valve
–  Inspect hoses and connection pipes to individual components, and between components → 1.8 l/132 kW Engine, Mechanical Components; Rep. Gr.26
16804
Bank 1, catalyst system		Efficiency too low
–  Generate readiness code → Chapter 01-4
–  if the same faults are displayed, check emission levels → Inspection and Maintenance
16806
Bank 1, main catalytic converter		Efficiency too low
16825
Tank ventilation system		Flow rate incorrect
–  Test valve -N80- → Chap. 01-1, final control diagnosis
–  Check connection of fuel system to throttle valve → 1.8 l/132 kW ENgine, Mechanics; Rep. Gr.20
16885
Vehicle speed signal		Implausible signal
–  Test vehicle speed signal in measured value block, display group 005
 
 
–  Test vehicle speed signal → Chapter 24-5
16890
Idling control		Speed under nominal value
–  Test throttle valve control unit → Chapter 24-2
–  Test secondary air injector -N112- → Chap. 01-1, Final control diagnosis
–  Inspecting air intake system for tightness (unmetered air) → Chap. 24-2
16891
Idling control		Speed above nominal value
16944
Voltage supply		Implausible signal
–  Inspect engine control unit power supply → Chapter 24-2
16946
Voltage supply		Voltage too low
16947
Voltage supply		Voltage too large
16955
Brake light switch -F-		Implausible signal
–  Check brake light switch and brake pedal switch in measured value block, display group 066
16985
16988
16989
16990
control unit defective		 
–  Replace engine control unit → Chapter 24-4
 
17069
Main relay ⇒ -J271-		Open circuit
–  Test voltage supply relay -J271- for engine control unit → Current flow diagrams and Fitting locations
17070
Main relay ⇒ -J271-		Short circuit to earth
17071
Main relay ⇒ -J271-		Short circuit to positive
17072
Main relay ⇒ -J271-		Open circuit
17510
Bank1, probe1 heating circuit		Short circuit to positive
–  Test lambda probe -G39 - and lambda control upstream of catalytic converter → Chapter 24-3
17511
Bank1, probe1 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 24-3
17519
Lambda control (Bench 1)		System too lean
–  Test lambda probe -G39- and lambda control upstream of catalytic converter → Chapter 24-3
17520
Lambda control (Bench 1)		System too rich
17521
Bank 1, probe 1		Internal resistance too great
17522
Bank 1, probe 2		Internal resistance too great
–  Test lambda probe -G130- and lambda control downstream of catalytic converter → Chapter 24-3
17523
Bank1, probe1 heating circuit		Short circuit to earth
–  Test lambda probe -G39 - and lambda control upstream of catalytic converter → Chapter 24-3
17524
Bank1, probe1 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 24-3
17526
Bank 1, probe 2 heating circuit		Open circuit
17535
Bench1, mixture adaptation (mult.)		System too rich
–  Test fuel pressure regulator and system pressure → Chapter 24-2
–  Test injected quantity and tightness → Chapter 24-2
–  Test valve -N80- → Chap. 01-1, final control diagnosis
17536
Bench1, mixture adaptation (mult.)		System too lean
–  Test injectors → Chapter 01-1, Final control diagnosis
–  Test fuel pressure regulator and system pressure → Chapter 24-2
–  Test injected quantity and tightness → Chapter 24-2
–  Testing intake system for leaks → Chap. 24-2
–  Checking the exhaust system for leaks
17544
Bench1, mixture adaptation (add.)		System too lean
–  Test secondary air system for leaks → 1.8 l/132 kW Engine, Mechanical Components; Rep. Gr.26
–  Inspect vacuum lines for leaks
17545
Bench1, mixture adaptation (add.)		System too rich
–  Test fuel pressure regulator and system pressure → Chapter 24-2
–  Test injected quantity and tightness → Chapter 24-2
–  Test valve -N80- → Chap. 01-1, final control diagnosis
17551
Load detection		Above limit
–  Check sender -G70- in measured value block, display group 002 → Chap. 01-5
–  Test throttle valve control unit → Chapter 24-2
17557
Lambda control Bench 1		implausible control value
–  Test lambda probe -G39- and lambda control upstream of catalytic converter → Chapter 24-3
17579
Angle sender 2 for TV drive -G188-		Implausible signal
–  Check angle sender in measured value block, display group 060 → Chap. 01-7
–  Test throttle valve control unit → Chapter 24-2
17580
Angle sender 2 for TV drive -G188-		Signal too low
17581
Angle sender 2 for TV drive -G188-		Signal too high
17584
Bank 1, lambda correction downstream of cat.		Regulating limit reached
–  Testing intake system for leaks (unmetered air) → Chap. 24-2
–  Test lambda probe -G130- and lambda control downstream of catalytic converter → Chapter 24-3
17606
Bank 1, probe 2 heating circuit		Electrical fault
–  Test lambda probe -G130- and lambda control downstream of catalytic converter → Chapter 24-3
17621
Injector cyl. 1 -N30-		Short circuit to positive
–  Test injectors → Chapter 01-1, Final control diagnosis
17622
Injector cyl. 2 -N31-		Short circuit to positive
17623
Injector cyl. 3 -N32-		Short circuit to positive
17624
Injector cyl. 4 -N33-		Short circuit to positive
17633
Injector cyl. 1 -N30-		Short circuit to earth
17634
Injector cyl. 2 -N31-		Short circuit to earth
17635
Injector cyl. 3 -N32-		Short circuit to earth
17636
Injector cyl. 4 -N33-		Short circuit to earth
17645
Injector cyl. 1 -N30-		Open circuit
–  Test injectors → Chapter 01-1, Final control diagnosis
17646
Injector cyl. 2 -N31-		Open circuit
17647
Injector cyl. 3 -N32-		Open circuit
17648
Injector cyl. 4 -N33-		Open circuit
17658
Fuel level		too low
–  Fill up with fuel, erase fault memory → Chap. 01-1
–  Read in fault memory of dash panel insert → Electrical System; Rep. Gr.01
17695
Turbocharger divert air valve -N249-		Open circuit
–  Test turbocharger divert air valve -N249- → Chap. 01-1, final control diagnosis
17696
Turbocharger divert air valve -N249-		Short circuit to positive
17697
Turbocharger divert air valve -N249-		Short circuit to earth
17705
Compressor - throttle valve connection		Pressure drop
–  Check hose connections → 1.8 l/132 kW Engine, Mechanical Components; Rep. Gr.21
17733
Knock control cyl. 1		Regulating limit reached
–  Fill with fuel of minimum 95 RON.
–  Check knock control with measured value block, display group 020 → Chap. 01-5
–  Check wiring to knock sensor → Current flow diagrams and Fitting locations
–  Tighten knock sensor with 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
17743
Engine torque monitoring 2		Regulating limit exceeded
–  Check hose connections → 1.8 l/132 kW Engine, Mechanical Components; Rep. Gr.21
–  Test sender resistance - G42- → Chap. 24-1
–  Check sender -G70- in measured value block, display group 002
–  Test sender resistance -G62- → Chap. 24-1
17744
Engine torque monitoring		Regulating limit exceeded
17748
Camshaft pos./crankshaft pos. sensor		Incorrect assignment
–  Inspecting hall sender → Chapter 28-1
17763
Ignition control cyl. 1		Open circuit
–  Check ignition coil with power amplifier → Current flow diagrams and Fitting locations
17764
Ignition control cyl. 1		Short circuit to positive
17765
Ignition control cyl. 1		Short circuit to earth
17766
Ignition control cyl. 2		Open circuit
17767
Ignition control cyl. 2		Short circuit to positive
17768
Ignition control cyl. 2		Short circuit to earth

  Note
t  regarding fault code 16496
t  Fault “signal too low” is stored after engine start after approx. 3 minutes idling.
t  regarding fault code 16500
t  The temperature sequence in the range 20°C to 60°C is compared to a model sequence stored in the control unit. The rise in the model sequence is slower than the real value. If the real values become too slow as a result of a fault they will eventually coincide with the model values. The engine control unit recognises such faults as implausible.
t  regarding fault codes 16500, 16501, 16502
t  As soon as one of these faults is detected the engine control unit uses the intake manifold temperature as a replacement value to start the engine. Then the temperature rises according to a model sequence stored in the engine control unit (5.25°C every 65 sec.). If the engine is warm after a certain period a fixed replacement value is displayed. This fixed substitute value depends on the intake air temperature.
t  regarding fault code 16705
t  Burr on the sensor body can generate auxiliary signals.
t  Fault “implausible signal” is stored if the number of crankshaft signals (60), taken by the reference mark, does not correspond.
  Note
t  regarding fault codes 16705 and 16706
t  If the clearance between the rotor and the sensor is greater than recommended the signals need not be recognised.
t  If the rotor is loose the signals may become irregular.
t  The auxiliary signals can be detected by interference signals.
  Note
t  regarding fault codes 16795 and 16804
t  If this fault is displayed during three consecutive engine operating cycles (engine runs at least 5 seconds) the engine control unit activates the exhaust warning light on the dash panel insert.
  Note
t  regarding fault codes 17069...17072
t  If this fault is displayed during three consecutive engine operating cycles (engine runs at least 5 seconds) the engine control unit activates the exhaust warning light on the dash panel insert.
  Note
t  regarding fault code 17072
t  If this fault occurs the engine control unit switches on the EPC warning lamp on the dash panel insert.
  Note
t  regarding fault code 17953
t  If this fault is displayed during three consecutive engine operating cycles (engine runs at least 5 seconds) the engine control unit activates the exhaust warning light on the dash panel insert.
t  If this fault occurs the engine control unit switches on the EPC warning lamp on the dash panel insert.
  Note
When attempting to start with a non-adapted key a static fault is stored in the memory. If the engine is subsequently started with an adpated key, the fault is converted to a sporadic fault.
   

Self-diagnosis III > < Self-diagnosis II