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Jerry, Master Mechanic
Category: Audi
Satisfied Customers: 17218
Experience:  ASE Master, 30+ years exp. imports and domestic, former shop owner
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02 audi TT: engine analyzer shows code # 1296

Customer Question

engine analyzer shows code # XXXXX for my '02 audi TT 1.8L. have no idea what it pertains to. can you help, please?
Submitted: 7 years ago.
Category: Audi
Expert:  Jerry replied 7 years ago.
Hello and welcome to Just, Super mechanic here. About your vehicle.

That is normally a bad, (sticking) thermostat, but it could be the coolant temp sensor. You would want to check the coolant temperature to see if it is getting hot enough.



Coolant thermostat, checking, removing and installing

Note: Always replace seals and gaskets.


Vehicles with air conditioning:

WARNING! The air conditioning refrigerant circuit must not be opened.
  • Unbolt front engine cover support from intake manifold.
  • Detach retainers for refrigerant hoses.


  • Unbolt A/C compressor, lift clear together with refrigerant hoses (do not disconnect) and tie in place on hood lock.
All vehicles:


  • Disconnect coolant hose from connection -3-.
  • Unscrew bolts -4- and remove connection, O-ring -2- and coolant thermostat


  • Clean and smooth down sealing surface for O - ring as required.
  • Insert coolant thermostat.
  • Installation position: bowed metal strip on thermostat must be vertical.
  • Moisten new O ring with coolant G 012 AS D.
  • Tighten bolts.
  • Fill up with coolant. See: Service and Repair

Tightening torque
Connection to cylinder block: 15 Nm

Testing coolant thermostat

  • Heat thermostat in water bath.


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