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Checking knock sensor > < Measured value blocks for ignition timing retardation

A3 Mk1

Evaluation of display group 020//022/023 - Ignition timing retardation
   
Evaluation of display group 020//022/023 - Ignition timing retardation
Indicated on displayPossible causes of faultFault remedy
All cylinders greater than 12°crankshaft
t  Knock sensor defective
–  Test knock sensor → Chapter
 
t  Connector corroded
 
 
t  Knock sensor incorrectly tightened
–  Loosen sensor and tighten to 20 Nm.
 
t  Loose components on engine
–  Secure components
 
t  Poor fuel quality
–  Change fuel type
One cylinder deviates significantly from the others
t  Connector corroded
–  Test knock sensor → Chapter
 
t  Engine fault
–  Checking compression: → 4-cylinder Engine (2-valve), Mechanical Components, Repair group 15
 
t  Loose components on engine
–  Secure components

   

Checking knock sensor > < Measured value blocks for ignition timing retardation