Engine management light is on. Done Fault reading using a VAG,Snap on machine test and also another premium Audi diagnostic machine. Didthree separate tests with three different machines. Same faults came up withall two fault codes on all of the machines.
1. Map controlled engine cooling thermostat Thermostat –fault code 17700
P1292, F265 OPEN CIRCUIT –
2. 02 SENSOR Circ, Bank 1 sensor 1 malfunction staticfault .code 16514, P0130
Mechanics Replaced front O2 sensor with brand n O2 sensor andalso replaced thermostat and cleared codes. Codes got erased and NO ignition light on. Drove car after 20 Mins and engine managementlight on again.
They did id VAG diagnostic test with machine again 02 sensorbank 1 sensor one Fault code 16514.
I read that audi 4cylinder engines have pre cat s1 andpost cat s2 sensors and uses a singlecircuit to control and monitor both the pre cat ( S1 ) and Post cat ( S2)sensor heaters on a given BANK As a result, the ECU can only monitor thecombined current draw of both of the sensors. Since it knows what the currentdraw should be for both heating elements, the ECU can still detect when onesensor fails because the current draw will be roughly half of its normal value.However, the ECU cannot determine which of the two sensors (S1 or S2)is malfunctioning, so to reflect its ignorance it generates the appropriatetrouble codes for both sensors to resolve this the mechanics did a
test each sensor individually with a multimeter anddetermine which one is actually defective and they said that both is signalling out the same current but still gives a fault code of 16514 bank 1 sensor 1 .
Now I’m puzzled towhy this is coming up as BANK 1 SENSOR 1 still
The thermostat 17000fault codes seem to have cleared. NO OTHER FAULT CODES.
Would it been possible the Thermostat was not installed possiblyproperly thus still reading 02 sensor issues or test each sensor individuallywith a multimeter and determine which one is actually defective. But if so whydid it not get picked on the VAG scan as a fault
Or does this mean my ECU is knackered??
Any help what to check would be appreciated as I’m running out of ideas here