Hey guys,
My Camry is giving me a little headache and I was wondering if you could help. The engine light came on, when I was driving on a hot summer day and felt like I need to turn the AC on. Same thing actually happen last year, but at this point I deleted the codes and didn't bother investigating as long as the light wouldn't show up again. But in general I feel like the engine lacks of power, especially with the AC on or when it's very humid outside. I feel like in the summer and the winter it's better. But sometimes I feel like I'm hitting the gas pedal and nothing is happening.
Anyway... engine light came on and I got following readings:
P0420: Catalyst System Efficiency Below Threshold Bank 1
P1210: No DTC definition found
Now regarding the P1210 I've found this thread saying it's a "random misfire, #3". But this code seems to be rare and there is not much information about it. So I haven't further looked into this one.
I looked into air/fuel and oxygen sensor. I found it a little weird that the air/fuel shows a .66V reading even if the engine is off, but it seems like that's the way it is. The thing I'm not sure about is when the engine is running and hot and racing, no matter what the air/fuel stays around that value. It slightly oscillates between .64V and .66V. I can see the full range of the sensor when I race the engine and get of the gas. The sensor then peaks up to .85V, falls to .55V curves back to .65V.
For the oxygen sensor I have seen different behaviors. I have seen something like a constant swing 0.85V and 0.20V to 0.40V. I have also seen a low signal as .12V with periodic peaks up to 0.85V.
Now, I'm sure it could be the catalytic converter. I did temperature measurements on it and it was 150 deg C before, 200 at inlet, 250 in the center and 200 at the outlet and after.
But before I go ahead and replace that, do have suggestions what I should check before? Could there be a problem with fuel pressure, ignition or injection causing those issues/symptoms?
My Camry is giving me a little headache and I was wondering if you could help. The engine light came on, when I was driving on a hot summer day and felt like I need to turn the AC on. Same thing actually happen last year, but at this point I deleted the codes and didn't bother investigating as long as the light wouldn't show up again. But in general I feel like the engine lacks of power, especially with the AC on or when it's very humid outside. I feel like in the summer and the winter it's better. But sometimes I feel like I'm hitting the gas pedal and nothing is happening.
Anyway... engine light came on and I got following readings:
P0420: Catalyst System Efficiency Below Threshold Bank 1
P1210: No DTC definition found
Now regarding the P1210 I've found this thread saying it's a "random misfire, #3". But this code seems to be rare and there is not much information about it. So I haven't further looked into this one.
I looked into air/fuel and oxygen sensor. I found it a little weird that the air/fuel shows a .66V reading even if the engine is off, but it seems like that's the way it is. The thing I'm not sure about is when the engine is running and hot and racing, no matter what the air/fuel stays around that value. It slightly oscillates between .64V and .66V. I can see the full range of the sensor when I race the engine and get of the gas. The sensor then peaks up to .85V, falls to .55V curves back to .65V.
For the oxygen sensor I have seen different behaviors. I have seen something like a constant swing 0.85V and 0.20V to 0.40V. I have also seen a low signal as .12V with periodic peaks up to 0.85V.
Now, I'm sure it could be the catalytic converter. I did temperature measurements on it and it was 150 deg C before, 200 at inlet, 250 in the center and 200 at the outlet and after.
But before I go ahead and replace that, do have suggestions what I should check before? Could there be a problem with fuel pressure, ignition or injection causing those issues/symptoms?