Thanks for your interest, I was able to track down what was the problem. Aparently it was the secondary air injection check valves (SAI). Came about from my check engine light being investigated. I'm told I should also change the O2 sensors. All header and exhuast related.c4c5specialist said:HI there,
First, what system of the car are you speaking of??
SAI is usually a term used in alignments, and is not a valve, it is a value, in degrees. Steering axis inclination is the name.
Please expand on what you mean, c4c5:z:
I had a P0157HC code come up when I checked, is this not related to the O2 sensors? Does this justify changing? Thanks, Jo Annc4c5specialist said:Yes, you are fine, however, I really would NOT change the o2 sensors, unless you are getting a code for the performance of the sensors.
P1415, and 1416 are for injection check valves. P0410 is for the entire system.
Codes for o2 sensors are totally different, and would have NO bearing on the previous mentioned codes.
All codes listed at most, are a 1 hour diagnosis, barring any mods done to the car.