ok so i have a 2000 disco 2 100k started running a little rough. it has a small exhaust leak and then all of the sudden check engine light starts flashing and i hear a very random knocking doesnt sound like ticking/lifter and no power very rough idle. when its cold it runs good (well a ton better). these are the codes coming up p0306,p0154,p0130 and p0139 the check engine light was already on. i was told an exhaust leak could not cause that bad of a running condition but could cause the o2 codes but o2 sensors should not make it run that bad????? anyone have any experience with this?

 

Sorry hear that you're having difficulty with your Rover. Perhaps if you repost in the DII section you'll receive a better response. General Tech isn't specific enough. Best of luck.

 

Will do thankyou.

 

P0306 Cylinder 6 Misfire Detected
P0154 O2 Sensor Circuit No Activity Detected
P0130 O2 Sensor Circuit
P0139 O2 Sensor Circuit Slow Response
Check engine light will come on for many reasons. According to the dtcs, it could be cylinde 6 and o2 sensor.