2008 prius has code p1121 so after some research I replaced the water pump/control valve I bought a new one from O'Reilly but after a week the same code came back water level is good, I checked wires they have power and ground good resistance , not sure what the problem is should I be looking or replace any specific fuse or relay ? Posted via the PriusChat mobile app.
Here is the workup for DTC P1121 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Prius%20Service%20Manuals%202004/%E4%BF%AE%E7%90%86%E6%89%8B%E5%86%8C/04pruisr/05/2054m/cip1121a.pdf Please post any updates in here.
California has a 15 year/150k miles emissions warranty for this failure p1121 You are checking the coolant level at the radiator right? Not the overflow tank
Unfortunately this car has 180, miles and yes at the radiator inverter and overflow tank as well coolent levels are fine in all 3 places , any more ideas ? Posted via the PriusChat mobile app.
Do you have heat? Bleed the system of air? I didn't know O'Reilly makes this part, most just use the OEM part from the dealer
Yes I have heat works fine , I replaced the coolant with a vacuum system , And yes O'Reilly got these parts Posted via the PriusChat mobile app.
Only advice left is to cycle the chrs pump but it seems there shouldn't be air in there. Maybe bad part. Hoses are correct, not mixed up?
Hose connections good I marked them twice , What I also noticed is the check engine light comes back days or a week after I reset it , So I was wondering is there a specific fuse or relay related to this part ? Posted via the PriusChat mobile app.
What are you reading the stored DTC(s) with? Those tank outlet temperature sensors can go bad, try doing a search if needed.
