P2198 Sensor stuck rich, replaced sensor no dice.

[jining]

Hey guys, I got a P2198 o2 sensor signal sensor stuck rich bank 2 sensor 1. I replaced it with a new sensor but the code is back 2 days later. I have cheapo ssac/xs-power catted downpipes, but I've had no codes for the last 1.5 years they've been on. Worth trying to replace the post-cat sensor or should I be looking elsewhere?

[jining]

I'm going to try tightening the downpipe maybe exhaust leak causing this?

[VinnysS4]

Hey guys, I got a P2198 o2 sensor signal sensor stuck rich bank 2 sensor 1. I replaced it with a new sensor but the code is back 2 days later. I have cheapo ssac/xs-power catted downpipes, but I've had no codes for the last 1.5 years they've been on. Worth trying to replace the post-cat sensor or should I be looking elsewhere?

Pre cat code, no need to replace post cat O2 sensor.
Quick Google search came up with a list of possible causes. I'd start checking off stuff from the list and see what's left :


"Potential causes of a P2198 code include: Oxygen (O2) or A/F ratio sensor or sensor heater malfunction Open or short in O2 sensor circuit (wiring, harness)
Fuel pressure or fuel injector problem Faulty PCM
Intake air or engine vacuum leaks
Faulty fuel injector(s)
Fuel pressure too high or too low
PCV system leak/fault
A/F sensor relay faulty
MAF sensor malfunction
ECT sensor malfunction
Air intake restriction
Fuel pressure too high
Fuel pressure sensor malfunction
Fuel pressure regulator malfunction Note on some vehicles that have been modified this code may be caused by the modifications (e.g. aftermarket exhaust, headers, etc.).

Read more at: https://www.obd-codes.com/p2198
Copyright OBD-Codes.com "

Sent from my SAMSUNG-SM-N900A using Audizine mobile app

[jining]

So I cleared it, its back with a P0159 as well now.... I'm thinking exhaust leak now? Thoughts?

[jining]

Found exhaust kind of loose, but I tightened it, cleared codes, throwing P2198, two counts.

[jining]

Well I'm stumped... If it was maf or something wouldn't I be getting it on both sides?