Prius (2004-09) :: 2005 - Code P1121 / Coolant Valve Control
i have a 2005 Toyota Prius that the air conditioner wont work in. it has Freon in it the compressor wont kick so I did some research and my cooling fans aren't kicking on so I did a by pass test and the cooling fans motor is good they just wont kick on. I just replaced my 2 cooling fan relays and they still wont kick on. the check engine light was on in the car when I got it. it throws the code P1121 coolant valve control. I got the part just got to get it put on. Could this part stop my cooling fans from kicking on or my ac compressor from coming on.
View 3 RepliesPrius (2004-09) :: Code P1121 - Coolant Flow Control Valve Position Sensor Stuck?
The check engine light on my '05 Prius has gone on and off a couple of times and is giving me a P1121 code, which I found out means "Coolant Flow Control Valve Position Sensor Stuck". Does this have anything to do with the hybrid electric coolant pump that was replaced under recall a while back?
View 5 RepliesPrius (2004-09) :: Check Engine Light Throwing Code P1121 For Coolant Flow Valve
My check engine light was throwing the code P1121 for the coolant flow valve. Toyota replaced it under a warranty enhancement (I have 134k on it), and since then my mpgs have gone from 46 to 50.
My AC is working much better now, too. My theory is that the valve can be in a semi-failure mode for a long time before throwing a code. Now that My coolant is flowing the way that it should, heat is being dissipated more efficiently.
Prius (2004-09) :: Code P1121 - Coolant Flow Control Valve Position Sensor Stuck
It's been a long week for me and my 2007 Prius. Brought it to the dealer after receiving my first ever CEL. I have 222,000 miles on the vehicle. The a/c was also blowing warm when the CEL came on. They checked that and told me that the compressor was "breaking up." Then they call me back to tell me that my 12V battery died. They asked me if I had problems with starting the vehicle. I said never. Never had any issues with the car in 222,000 miles.
Well, told them to replace the battery (no choice) and the car is 5.5 years old in Florida heat so it was ready to die. Very suspicious that it died while they had the vehicle, but what can I say. Told them to not repair the coolant flow valve or the a/c until I could investigate further on my own. CEL is now off. The a/c is blowing cool again.
Prius (2004-09) :: 2008 - Getting P1121 / P1116 - Replaced Coolant Control Valve And Red Triangle?
So I drive a 2008 and a couple months ago I started getting the Check Engine Light. Codes P1121 & P1116. Found out it was most likely related to a faulty Coolant Control Valve or Electric Water Pump. Since the pump was just recently changed I went ahead and got the valve changed.
The light is still coming and going but now when I go on the expressway that red triangle with the exclamation pops on with a little beep. Only pops on for a couple seconds and keeps coming back until I drive a bit slower.
Prius (2004-09) :: CEL For P1121 / Valve Replacement?
I have a 2004 toyota Prius with 185k miles on it and recently got the CEL for P1121. I checked both coolants and turns out that the engine coolant was completely out. I immediately filled it up and the CEL went off for a couple days. It has come back and is on constantly, I checked the coolant and the coolant is at the correct level.
View 19 RepliesPrius (2004-09) :: Coolant Flow Valve Code 1121 With CEL On
I have read all the posts pertaining to this code, replaced my coolant flow valve, bled all the air out of the coolant system and still am getting the cel with the 1121 code.
I have tried setting multiple coolant flow valve positions, checked all wiring in harness, coolant level is full in rad and reservoir, checked temp sensor at bottom of storage tank, checked pump operation at top of tank to attempt to clear this code to no avail.
Is there a default position the valve is to be in before cold start up?
Is there anything else that can trigger this code? What am I missing?
Prius (2004-09) :: Error Codes P1121 And P3000 - Not Enough Coolant
So I received the P1121 and took it to the dealer. They told me I also had a P3000. I called another dealer and they said the P3000 could be caused by the P1121 not giving it enough coolant. So I brought it back to the house, bought the valve listed in the forums, and I spent all day changing that + the coolant. I drained the coolant and between the reservoir and the radiator cap itself I refilled about 4 QT, and I saw that my inverter coolant was just below the low line, so I filled it up to the full line. Afterwards, I tried to get the coolant to flow, and it seems like I won't flow. The check engine light immediately came back on and the car said, "Problem." So I immediately shut it off and let it set for a few days. How do I get it so that the coolant starts flowing again. I haven't seen any of the levels move whatsoever on the radiator.
View 8 RepliesPrius (2004-09) :: CEL / Code P1121 Came On?
Two weeks ago my CEL came on and the code was P1121. I checked the coolant level and everything seemed fine, so I figured I'd take it in soon.
View 2 RepliesPrius (2004-09) :: 2005 - Got Code P1121 With CEL?
2005 Prius, 105K miles when the check engine light came on.
Scanner report: P1121 accelerator pedal position sensor range/performance problem.
Fix: Coolant flow control valve. (Even though it was still working)
Part number: 16670-21010
Prius (2004-09) :: 2006 - P1121 Error Code Pulled Over
I have a 2006 prius whose check engine light just came on 1 hour ago. I had it diagnosed and it is giving me the p1121 code, or the coolant flow control valve. I checked the coolant level and it was very low. I added fluid, but the CEL is still on. I have to make an 11 hour trip tomorrow.
View 19 RepliesPrius (2004-09) :: What To Do About Check Engine Message - Code Is P1121
About once a week my check engine light comes on. The code is P1121, which is about coolant valve sticking. In about one or one and a half days it times out and i dont get the warning light for another week or so. Do you think I should have something done right away or wait and see what happens?
View 1 RepliesPrius (2004-09) :: Code P1121 After Main Water Pump Replaced
On my 05 Prius (65K miles) I recently had my local Toyota dealer replace both the inverter water pump (for free per recall) and main engine water pump (~$500 based on their recommendation because of some coolant leakage). 1 week later, I got the P1121 code coming off and on intermittently.
My dealer says that the work they did is not related to P1121.
Prius (2004-09) :: 2005 - Battery Drains Fast And The Car Running Rough / Code P1121
Code says P1121 Accelerator Pedal Position Sensor Range/Performance Problem. I heard that was wrong and its really coolant control valve? The battery drains fast and the can runs like crap. Would this code be doing that to the car?
View 18 RepliesPrius (Gen 2) :: 2004 - Red Triangle After Coolant Control Valve Replacement
2004 Prius, 98K miles ... I recently replaced the coolant control valve (received code P1121) and added coolant. Trouble codes were cleared. I am now getting the red triangle intermittently. When I drive the car, after a few minutes, the red triangle comes on. I can shut off the car, and turn it back on, and the red triangle comes back after a few minutes. The car seems to drive normally.
View 3 RepliesPrius (2004-09) :: Sloshing Sound From Behind The Dashboard - New Coolant Valve
We've gotten quite a bit of rain in the LA area over the last couple of days and I noticed today that sometimes when I start/turn-off the car I hear what sounds like a liquid sloshing around behind the dashboard. Reading on the boards it sounds like a clogged A/C drain, but as it happens I just had the Coolant Valve replaced yesterday (after CEL came on with a P1121 diagnostic code) and so I wanted to check in -- could this be at all related to the new valve OR is it likely just a coincidence?
View 10 RepliesPrius (2004-09) :: Check Engine Light Just Came On - Coolant Control Valve Sensor?
My wifes 2008 prius check engine light just came on. Its the control valve sensor. My question is, does that have any serious impact on safety? I've heard mixed on what this valve does (overheating etc).
View 6 RepliesPrius (2004-09) :: 2009 - Check Engine Light Came On / Coolant Valve Replacement
I have a 2009 Prius and the check engine light came on last week. I decided to take it to a highly recommended auto repair shop instead of the dealer. The error cord was P1121 and they replaced some kind of coolant control valve. When I went to take the car home I noticed the check engine light was still on and they said there was another similar but different coolant valve that needed to be replaced. They replaced the other part and everything seemed fine.
View 10 RepliesPrius (2004-09) :: Intermittent Buzzing Sound From Engine Bay - Bad Coolant Flow Control Valve
For several months now, my 2007 Prius has been making an intermittent buzzing sound from the engine bay. When I first heard it, I thought I had hit the little lines they cut into the road to let you know you've drifted over the center line - the sound is like that, a low-pitched buzzing noise. Today, the check engine light came on as it was making that noise. I put a code reader on the car and got P1121, a bad coolant flow control valve. Wondering if the sound and the faulty control valve are just coincidental or if the valve might make that noise when it fails? And if not the valve, what the sound might be?
View 19 Replies