Prius (2004-09) :: 2009 - Check Engine Light Came On / Coolant Valve Replacement
May 15, 2015
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.
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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).
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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.
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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.
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I was getting a check engine light with a P1112 code, so I had a mechanic replace the coolant flow control valve. There's a TSB on that and it seems to be the thing to do. But after the replacement, I'm getting overheat warning light whenever the engine needs to work hard. Also, the cabin heater only works when the gasoline engine is not running... when the engine is off, I get heat (though it's not as hot as I'd think when I have it on max heat), but when the gas engine kicks in, the cabin heat disappears.
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So sometime last week my check engine light came on. Took my 13 Accent to the dealership and they said the purge valve is to be replaced. Now my Accent pings when running 87 gas and I read that others (not necessarily Accent owners) who changed their purge valve noticed the pinging go away.
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Our 2008 Equinox with roughly 90K miles showed the "service stabilitrack" warning on a Friday, next day light was still there now paired up with "check engine" light. My husband did something to the "stabilitrack" button which made both lights go away for a couple of days. Then both of these returned. Took the vehicle to the dealer (we always do for service, we just don't know some good mechanics in our area and so far we had not had any major issues with the vehicle).
They tell my husband it is the EGR valve that supposedly needs replacement and that the reason it got to be bad is because we failed to maintain / clean the fuel injectors so those need to be washed / cleaned / serviced too so that the whole issue is resolved. No mention about the "stabilitrack" thing at all. Due to our needs of the vehicle and our lack of cars knowledge we agreed to it without looking into it further.. Lights have been off since that and we didn't think much of it.
But then this weekend we got this "recall" letter in the mail for that very same vehicle... talking about the "check engine light" being the issue and an apparent leak of gasoline (via odor or visual leak)... Maybe these are totally unrelated ...
I checked the manual for the recommended maintenance and nowhere there is mention of regular maintenance needed for the fuel injectors.. I looked online and while there seems to be varied opinions most of them agree that is something not needed; neither it is the EGR valve replacement... so now I am really wondering! Was it all for nothing? And how is one supposed to know this. Is the "check engine" light enough of an issue to maybe think this was the right thing to do?
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I purchased a build Dec 05 1.3l Yaris several months ago. I recently started to get a check engine light, so I did a scan of the computer and it returned a P0012 error. Though multiple searches, I learned that this is likely due to the Camshaft Timing Control Valve Assembly or possibly the OCV filter.
Further searches haven't been able to reveal which parts I need to purchase to replace these items. I can only find details for the 1.5l engine.
The engine is: 2nz-fe, model: ncp90r-agmrkq
1. I don't even know where these parts are located on the car?
2. What part numbers do I need to purchase to replace?
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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?
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My check engine light is on and I think the inverter pump is shot. I have a some questions about how and when the pump is on. I have a mini vic on order and as soon as I get it hooked up I'll run for some codes. That is if I get it installed????
1- With the car in "ready mode" and at start up (car cold) should the inverter coolant pump be running.
2- With the car in "ready mode" Should I always see a water moving in the water reservoir.
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My wife's car is a 2002 Prius, 149 k miles. Lately the check engine light has been coming on. I took it to the dealership, and their assessment is that the catalytic converter needs to be replaced. They are recommending about $2,000 + of repairs. While I am contemplating the practicality of investing that much in keeping this car going I'm wondering if it harmful or dangerous to continue operating this vehicle.
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The check engine light came on yesterday. 2004 with 115K. Auto Zone read the codes and they are as follows:
Definition:
Idle Air Control Valve control circuit.
Probable Cause:
Open or short circuit condition.
Poor Electrical Connection
Failed IAC motor
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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.
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I own a 2009 Prius (4 years and 4 months old) with about 33K miles on it. Last Sunday while driving the Check Engine Light (CEL) suddenly came on. I made it home and started digging for possible causes - everything from a loose gas cap to a failure in the water pump for the inverter to a 12V battery nearing the end of its life. I've eliminated the water pump for the inverter as the source of the problem since, when I put the Prius into "Ready" mode, I can see movement in the fluid reservoir (when the gas engine is not on) indicating that the pump is working (it had also been replaced under a recall on that water pump a couple of years ago).
I'm down to a loose gas cap (which I checked and tightened) or the 12V battery as possible problems. I've tightened the gas cap but the CEL won't go off and I'm about to replace the 12V battery. Will that clear the CEL? I'm going to take it to a mechanic on Friday morning (my first opportunity - until then it's sitting in the garage) to get a code readout. Could this be something more serious? I mean the car is under 5 years old and has only 33K miles on it! What else could be causing the CEL to light up?
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What is the to cause to check engine light go off. I will take my car to auto zone tomorrow morning to hopefully get a code and see if I can fix it myself... if not, then I am going to have to go to the dealership.
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So the day before my 20,000 mile service was scheduled my check engine light came on. I took the car into the dealer and told them the light was on. When I got the call that the car was done they said that the EGR valve was bad and they ordered me another one. They said that they cleared the code and that the part would be in this week. Since they cleared the light it has not come back on. My question is did I lose my Revo stage one tune in my TDI? The dealer never said anything so I didn't want to ask if they had reset my ECU.
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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?
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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?
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I brought my 2004 Passat 1.8 in for check engine light-- After checking several things and test driving the car they said the finally found the problem-- the "combinations valve" I searched the forum and below was all I found this under that word combo-- is that the only "combination valve"? This is not something I've heard about before-- are they just saying perhaps 2 different valves?
" Turbocharging System, Overview"
For brake booster
10 - Air filter with Mass Air Flow (MAF) sensor - G70 -
11 - Pressure control valve for crankshaft housing ventilation
12 - Combination valve
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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.
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I only have 2200 miles on my new 2012 Passat SE V6 and the check engine light came on the other morning. I took it in to the dealer and they found codes P0442 (EVAP Emission Control System Small Leak Detected) and P0456 (EVAP Emission Control System Very Small Leak Detected). The tech says on the work order that he removed and tested the EVAP Purge Valve with a vacuum pump and the valve would not hold a vacuum. The dealer replaced the EVAP Purge Valve under warranty. They say this is the first 2012 passat V6 they've seen with this issue. I've only had the car for 4 weeks.
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