Vehicle Questions and Answers
Welcome to the Vehicle Q&A Hub. Find answers to your automotive questions, share your experiences, and get expert advice on vehicle maintenance, troubleshooting, and more!
Can you tell me the diagnostic trouble code for a Toyota Prius, specifically code P1116?
2278 views
4 answers
★ Top Answer
In a Toyota Prius, the P1116 code indicates a voltage problem with the engine coolant sensor that sends a signal to the computer outside the manufacturer's specified range. The second-generation Prius, made between 2004 and 2009, features a 3-way valve that regulates coolant flow to the engine, hot coolant storage tank, and heater core. This valve helps in heating the cabin and lowering cold-start emissions. If there's an issue related to emissions in the Prius, the check engine light will turn on, signaling a problem with the valve. There is a risk of the control valve getting stuck, and Toyota has released a technical service bulletin addressing this issue.
More answers
-
I changed the sensor, but a week later the check engine light came back on with the same code. Some online discussions suggest that the issue could be related to either the sensor or the 3-way valve, as they both send signals to the computer. The valve may sometimes trigger the P1121 code in addition to the P1116 code. I decided to start with replacing the sensor since it's quicker and less expensive to do so.
-
Does this mean that code P1116 indicates a faulty 3-way valve or a malfunctioning engine coolant temperature sensor?
-
The code p1116 on a Toyota Prius indicates a problem with the engine coolant sensor, specifically that it is out of range or not within the self-test range.
Buying a Used car?
Check it by Epicvin
Check it by Epicvin
