safecracker
Active member
These codes appeared this past weekend. I have had the P0174 multiple times over the years. So I did some investigating. Cleaned throttle bodies, Inspected the Maps sensor hoses, they are silicone and in good shape. Cleaned the hose port on the back cylinder with throttle body cleaner. Removed rear spark plug to check condition, plug had good color, brown. Now I am pretty sure that it is getting enough fuel plus engine is running good. So it leaves me with 2 possible component failure. First and most likely is the purge valve is sticking open or possibly the O2 sensor. P1130 refers to possible O2 sensor failure. Talked with local tech and we agree it is probably the purge valve. Tech gave me a known working purge valve,(free) so I will change it out if error reoccurs. I know I could plug the input to the purge valve, which I might do if used does not work. So I will be testing valves when I have my next fault. As mentioned above engine runs, starts and idles fine. Keep you posted. Bruce
