So I fairly recently bought a 2002 WRX with a CEL it was just Bank 1 Sensor 2 O2 and crankshaft position sensor.
So last weekend I replaced both sensors(Bosch for O2) and it was running great but after roughly 100 miles my boost gauge stopped working and about two minutes after that my CEL came on. I just read the code and it was 02 Sensor Circuit Malfunction(Bank 1 Sensor 2) again (P0136). So im wondering did I just happen to get a faulty O2 Sensor or is there something else i should be looking at.
Just a side note my car appears to also have a boost leak somewhere I never get more than about 5.8 PSI or .04 MPa I dont know if this is part of the problem or just another thing i have to fix.
AEM Ram air intake
HKS Hi-power exhaust
The rest stock
Thanks in advance