I have a 2013 Forester limited with 365k miles. Had a new engine at 100k for the oil consumption recall. I was having problems with the coolant overflowing through the overflow tank. I replaced the radiator, thermostat, and pump. Now when I try to start the car I get error codes P0118,P0128, P0117, P0327, P0451, P0128. The only way to start is erase codes and immediately turn the key. I can't clear them with my code reader, they come right back on. I've disconnected the battery for over two weeks and codes are still there. I purchased and installed a ground kit, didn't help. The passenger side cooling fan also comes on as soon as the key is turned. I took it and had a guy check, there isn't any indication of a head gasket leak. If I run the car the coolant circulation problem appears to be fixed. I have no idea what to do next. Thanks for any help or suggestions. We need to figure this out or get rid of the car. Thanks.
Jcreedon1
Since the codes always turn on with the key, it will be easy to know when you find your electrical problem. You will only have to turn on the key to see if your repair fixed the problem.
Check any wires or connectors you unplugged or moved during your repairs.
Check any wires or connectors you unplugged or moved during your repairs.
It is almost certainly an electrical issue.
P0117, P0118 are cooling system sensor fault codes.
P0128 is a calculated relationship by the computer comparing the coolant sensor output to expected output.
P0327 is a knock sensor fault code.
P0451 has to do with fuel tank pressure.
The first four codes don't even indicate a failing part. Looking for the nexus on these issues leads to the ground system for the car and ECU.
P0117, P0118 are cooling system sensor fault codes.
P0128 is a calculated relationship by the computer comparing the coolant sensor output to expected output.
P0327 is a knock sensor fault code.
P0451 has to do with fuel tank pressure.
The first four codes don't even indicate a failing part. Looking for the nexus on these issues leads to the ground system for the car and ECU.
Thanks for all the suggestions, I will check all the wiring and connections. I will also recheck the grounds, especially the ground by the radiator. I appreciate all the suggestions.
Hi, I have a Subaru Forester X Premium 2013. Engine was replaced at 55k miles by oil Consumption recall, I have had some crazy issues hard to diagnose on mine but I still want to keep it. In your case, this might sound nonsense, but by any chance, did you perform any work on the front suspension? Knucle replacement, Axle Sensors?
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