SES light again
Thread Starter
Teching In
Joined: Jul 2004
Posts: 49
Likes: 0
From: Westminster, Ca
SES light again My car has 94k miles on it and recently the SES light went on. I scanned it and it was o2 sensor code. I replaced both front o2 sensors and the plug wires. A few thousand miles ago I replaced the plugs. The car is running perfectly with a smooth idle and no problems. Well the SES light came on again 2 days ago and the codes P0134, P0135, P0420, and P1133 came up. I cleared the codes and car was running fine but the SES light came back on. Could the new o2 sensors be bad or the cat. Thanks
I know for a fact that P0420 is for a bad driver's side cat. I just had it two weeks ago and since I was under the manufacturer's exhaust warranty of 8 years/80,000 miles the dealer replaced the cat at no charge. I did not get any other codes except for P0420 though.
