My ses light started blinking today. The light has been on for 1 week but started blinking today. I scanned it and get codes P1133 and P1153 O2 sensor Insufficient switching in both banks on sensor 1. Usually I clear the codes when they pop up but this time I didn't clear it. I have long tube headers and I know it's a common code to throw with long tubes. Is the ses light blinking because I didn't clear the codes and just let them stay on?

 

Most of the time when the light starts blinking its a misfire. How do the car run ?

 

yesterday i put covers over the spark plug wires...after i posted what happened i went outside and checked to make sure the plug wires clicked into the coil packs and spark plugs...driver side was good.....i think it was the second one in from the front on the passenger side. i heard a click when i pushed the spark wire on the coil pack. I took the car out for about a 50 mile ride. NO FLASHING!!!!....i guess the spark wire wasn't set in all the way on the coil pack.

 

why didn't it throw a DTC for that cylinder tho? the only codes i got where the ones i mentioned.

 

Is the tool you have a code puller or a real scanner ? Its possible that the misfire code was under a pending code and not a current code

 

not sure its a.....Actron PocketScan Plus CP9550