1.4 16v 2001 Polo engine AUA.
ECU Amber check light came on and the went off again. The car runs OK but under load apppears to struggle like an igition fault.
I plugged in a Fault Code reader and the only Code is 17604. Which I think is O2 sensor. I erased the code.
Been on lots of 10 miles plus drives. ECU light stays off with no codes. Went on a short trip to get a tyre. ECU light back on.
Just bought a Bosch 5 wire Lambda sensor from the motor factors, which they say is was the correct one and fitted it.
Now, straight away the Engine light comes on. Read the codes. Now I have 3.
All lambda related. The car ran fine.
Do I need to program the ECU which this new sensor or should it work without.
I put the old sensor back in, erased the codes. ECU light now 'off' back to square one.
Anyone out there with some advice please?
Lambda Probe And Fault Code 17604
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