All,
Figured I'd share the following information since it was a bit difficult to find on here for our car. I have a 2013 Cadillac CTS4 Premium with the 3.6L V6 engine (and about 89,000 miles on the odometer).
Problem: A few weeks ago I had topped off my tank at the gas station. I don't normally top off the tank, but I wanted to round up the nearest dollar (stupid me). A few days (and ~50-100 miles later) and my CEL pops up. Code that comes up is P0496. Engine seemed to hesitate a little more than normal, but otherwise I don't notice much. What I found on this site (for other models/generations) seemed to indicate the purge solenoid was the problem. When waiting for the replacement part, I had filled up again and the car had trouble starting (cranked for 5-7 seconds before starting).
Solution: I ordered the part from the Cadillac dealer near me (the parts department guy did a great job helping me out). It was AC Delco Part Number 12610560 and cost about $58. The part came in an AC Delco bag, but is actually made by Bosch. A little bit of googling led me to this youtube video called PO496 Evap System Flow During Non-Purge Cadillac STS. The trouble shooting and replacement of the component is identical. I think the bolt is a size 10mm to remove. There is a small "fuel line clip" that helps secure the inlet to the purge solenoid that the guy in the video specifically says "be careful and don't break this." Naturally, I broke it. Thankfully, they sells these at my local Advance Auto Parts at $5 for a half-dozen. After replacement, I checked my scan tool again and found that I had codes P0496 (still) and P0443 (new). I believe this popped up when you disconnect the electrical connector from the old solenoid for trouble shooting.
Post Solution: I cleared the codes, and about 150 miles and a few days later, everything seems to be working wonderfully. Subjectively, the car feels a lot better than it has in a while during driving. No engine hesitation and acceleration is smooth. I will update if the problem comes back, but I think this solved it.
Figured I'd share the following information since it was a bit difficult to find on here for our car. I have a 2013 Cadillac CTS4 Premium with the 3.6L V6 engine (and about 89,000 miles on the odometer).
Problem: A few weeks ago I had topped off my tank at the gas station. I don't normally top off the tank, but I wanted to round up the nearest dollar (stupid me). A few days (and ~50-100 miles later) and my CEL pops up. Code that comes up is P0496. Engine seemed to hesitate a little more than normal, but otherwise I don't notice much. What I found on this site (for other models/generations) seemed to indicate the purge solenoid was the problem. When waiting for the replacement part, I had filled up again and the car had trouble starting (cranked for 5-7 seconds before starting).
Solution: I ordered the part from the Cadillac dealer near me (the parts department guy did a great job helping me out). It was AC Delco Part Number 12610560 and cost about $58. The part came in an AC Delco bag, but is actually made by Bosch. A little bit of googling led me to this youtube video called PO496 Evap System Flow During Non-Purge Cadillac STS. The trouble shooting and replacement of the component is identical. I think the bolt is a size 10mm to remove. There is a small "fuel line clip" that helps secure the inlet to the purge solenoid that the guy in the video specifically says "be careful and don't break this." Naturally, I broke it. Thankfully, they sells these at my local Advance Auto Parts at $5 for a half-dozen. After replacement, I checked my scan tool again and found that I had codes P0496 (still) and P0443 (new). I believe this popped up when you disconnect the electrical connector from the old solenoid for trouble shooting.
Post Solution: I cleared the codes, and about 150 miles and a few days later, everything seems to be working wonderfully. Subjectively, the car feels a lot better than it has in a while during driving. No engine hesitation and acceleration is smooth. I will update if the problem comes back, but I think this solved it.