Major Malfunction
New member
- Joined
- Sep 21, 2015
- Messages
- 15
Hi all,
Relatively new member looking for a second opinion/advice on my Puma Thunder!
Last week my engine warning light illuminated, after connecting my OBD2 connector and using ForScan it highlighted the P0420 - Catalyst System Low Efficiency code. I've noticed that it smells quite rich, however other than that the car drives well, with no detectable mis-fire... (Saying that I have noticed a small crack in the coil-pack body and will be replacing that anyway).
This morning I decided to monitor some live readings from the oxygen sensors O2S11 (upstream) and O2S12 (downstream), and the engine coolant temp sensor. Whilst keeping the engine speed at 2000rpm this created the following readings...
My question is, is my catalyst shot or could it be false readings due to something else? I'd really like to avoid buying a new cat! I've had a quick look for exhaust leaks, re-gapped the spark plugs, even filling it with v-power in the hope the light will go out!!
Does anyone have any suggestions for what else to look for?
Thanks in advance!
Relatively new member looking for a second opinion/advice on my Puma Thunder!
Last week my engine warning light illuminated, after connecting my OBD2 connector and using ForScan it highlighted the P0420 - Catalyst System Low Efficiency code. I've noticed that it smells quite rich, however other than that the car drives well, with no detectable mis-fire... (Saying that I have noticed a small crack in the coil-pack body and will be replacing that anyway).
This morning I decided to monitor some live readings from the oxygen sensors O2S11 (upstream) and O2S12 (downstream), and the engine coolant temp sensor. Whilst keeping the engine speed at 2000rpm this created the following readings...
My question is, is my catalyst shot or could it be false readings due to something else? I'd really like to avoid buying a new cat! I've had a quick look for exhaust leaks, re-gapped the spark plugs, even filling it with v-power in the hope the light will go out!!
Does anyone have any suggestions for what else to look for?
Thanks in advance!