2004 - 2009 TOYOTA PRIUS DTC CODE P1121
P1121:Three way coolant controle valve stock. See image
Fix:
Replace the coolant control valve assembly. Part Number 16670-2010. See Location here
NOTE:
Mark the hoses so you can connect them back correctly after replacing the valve assembly.
Fair price for this fix should be between $300 to $400 at the repair shop.
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