R50/53 Confused about OBD codes and Issues
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Joined: Mar 2016
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Confused about OBD codes and Issues
Hey guys,
Really stumped here. I'm getting three codes.
P1242
P0507
P0136
My car is idling terrible (rough, and way high- usually 1200 to 1700 RPM), and also running rich (can smell and exhaust is black). I'm also averaging about 19 MPG combined (mainly highway). So I figured after all of the troubleshooting I've done, including replacing my bypass valve and getting a vacuum leak test, I'd try the o2 sensor.
From what I understand, that code (P0136) refers to the post cat sensor. But, I know the precat controls mixture. So idk what to try. I feel like I'm having issues with my precat, but the code leads to post. I also know the post was replaced somewhat recently with a Bosch sensor. So they would make sense that it's giving me issues, but it wouldn't affect MPG and whatnot...
Any ideas? Do I just try this new NGK sensor in the precat and see?
Really stumped here. I'm getting three codes.
P1242
P0507
P0136
My car is idling terrible (rough, and way high- usually 1200 to 1700 RPM), and also running rich (can smell and exhaust is black). I'm also averaging about 19 MPG combined (mainly highway). So I figured after all of the troubleshooting I've done, including replacing my bypass valve and getting a vacuum leak test, I'd try the o2 sensor.
From what I understand, that code (P0136) refers to the post cat sensor. But, I know the precat controls mixture. So idk what to try. I feel like I'm having issues with my precat, but the code leads to post. I also know the post was replaced somewhat recently with a Bosch sensor. So they would make sense that it's giving me issues, but it wouldn't affect MPG and whatnot...
Any ideas? Do I just try this new NGK sensor in the precat and see?
Last edited by cagersguy55; Jul 28, 2016 at 06:14 PM.
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