Water got low, throwed a code
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Post Fiend
Joined: Mar 2009
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From: Mt. Shasta California
Water got low, throwed a code
I was going up a little grade a couple days ago and the engine suddenly quit, the temperature and oil light came on, the heat gauge buried on hot, and it threw a code. I pulled over and it was still idling so I made a U-turn but it was in limp mode and would only go about 10 MPH, so I made it home and put water in it so it's good now but it still says service engine soon. What is the code going to say and am going to have to pay to get rid of it. (the light). I have a new cap coming.
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Joined: May 2004
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From: Central Coast of CA
Head to an Autozone, they have scanners that you "buy," then return a few minutes later, after you've read the code in the parking lot.
They'll even read it for you if you ask them.
Stewart
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Post Fiend
Joined: Mar 2009
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From: Mt. Shasta California
Thanks, I will have to wait until I get into Redding which is 55 miles away. Anybody know why just low water would cause the service engine light to come on and why didn't adding water fix it and why did it go into limp mode. I kind of like the old days better when you could watch the heat gauge and make your own decisions.
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From: Isanti, MN
Thanks, I will have to wait until I get into Redding which is 55 miles away. Anybody know why just low water would cause the service engine light to come on and why didn't adding water fix it and why did it go into limp mode. I kind of like the old days better when you could watch the heat gauge and make your own decisions.
Otherwise, I agree with Stewart. Take it to a parts store and see what the code says.
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Post Fiend
Joined: Mar 2009
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From: Mt. Shasta California
It never got hot, the gauge went from normal to instantly buried on hot. It will be weeks before I go to the city to check it and what would it say, ran low on water?
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Joined: May 2004
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From: Central Coast of CA
I used to have a thermostat that caused the same problem many, many years ago on my Cougar.
On a cold engine, after the initial warm-up (long enough to open the thermo), if I stopped and shut the engine off for any length of time, the thermo would close, even though it shouldn't have. The subsequent engine start would boil the coolant because the thermo would stick closed, until the pressure got to be too much and it would suddenly open, allowing the super-heated coolant to flow, and the dash gauge would peg.
After about a dozen times of this happening I finally blew my head gasket.
Stewart
On a cold engine, after the initial warm-up (long enough to open the thermo), if I stopped and shut the engine off for any length of time, the thermo would close, even though it shouldn't have. The subsequent engine start would boil the coolant because the thermo would stick closed, until the pressure got to be too much and it would suddenly open, allowing the super-heated coolant to flow, and the dash gauge would peg.
After about a dozen times of this happening I finally blew my head gasket.
Stewart
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Joined: Oct 2001
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From: Washington State
Maybe the sensor detected it because it was not bathed in water (coolant).
Looks like your coolant flush didn't work as well as expected. Or you didn't "burp" the system. Now, go change your thermostat.
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Post Fiend
Joined: Mar 2009
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From: Mt. Shasta California
It would say (probably) P1299 Cylinder Head Temperature Sensor Detected Engine Overheating Condition.
Maybe the sensor detected it because it was not bathed in water (coolant).
Looks like your coolant flush didn't work as well as expected. Or you didn't "burp" the system. Now, go change your thermostat.
Maybe the sensor detected it because it was not bathed in water (coolant).
Looks like your coolant flush didn't work as well as expected. Or you didn't "burp" the system. Now, go change your thermostat.
Actually that was a great way to drain /refill the water and there was no need to touch the thermo since all the water came out the bottom hose and it was run 10 minutes with petcock open also(read the original post). My water is crystal clear now with no traces of rust/corrosion.
Last edited by Stewart_H; Sep 9, 2012 at 05:43 PM. Reason: CLEAN UP.
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Thread Starter
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Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
I used to have a thermostat that caused the same problem many, many years ago on my Cougar.
On a cold engine, after the initial warm-up (long enough to open the thermo), if I stopped and shut the engine off for any length of time, the thermo would close, even though it shouldn't have. The subsequent engine start would boil the coolant because the thermo would stick closed, until the pressure got to be too much and it would suddenly open, allowing the super-heated coolant to flow, and the dash gauge would peg.
After about a dozen times of this happening I finally blew my head gasket.
Stewart
On a cold engine, after the initial warm-up (long enough to open the thermo), if I stopped and shut the engine off for any length of time, the thermo would close, even though it shouldn't have. The subsequent engine start would boil the coolant because the thermo would stick closed, until the pressure got to be too much and it would suddenly open, allowing the super-heated coolant to flow, and the dash gauge would peg.
After about a dozen times of this happening I finally blew my head gasket.
Stewart
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Joined: Dec 2006
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From: Hattiesburg, MS
May be a good time for a scanguage. It will monitor ur temps more precisely and allow u to check and clear codes urself. I have heard the dash gauges r set to stay in the middle for a certain range of temp, once it gets higher than that range, it will peg out.
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Post Fiend
Joined: Mar 2009
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From: Mt. Shasta California
So I have to buy a gauge just to get rid of the light? Again; the temp gauge never even got to the middle and I could put my hand of the valve covers, no steam, no boiling, no ambient heat from engine, nothing. It pegged when it went into limp mode.
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
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From: Washington State
Pull your battery cable and reset your system. Since it was temporary fault, the light should go out. It's not against the law.
So you did your coolant change in response to this? Odd you wouldn't mention it before. You could understand why I would think it had something to do with your coolant flush and refill since you posted about that FIRST.
You should reread Stewart post about the thermostat.
So you did your coolant change in response to this? Odd you wouldn't mention it before. You could understand why I would think it had something to do with your coolant flush and refill since you posted about that FIRST.
You should reread Stewart post about the thermostat.
Last edited by Stewart_H; Sep 9, 2012 at 05:44 PM. Reason: Had to remove a quoted post
Thread Starter
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Post Fiend
Joined: Mar 2009
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From: Mt. Shasta California
Don't turn into an immature little bitch, Brent. (Not a personal attack, like yours, simply random advice.)
Pull your battery cable and reset your system. Since it was temporary fault, the light should go out. It's not against the law.
So you did your coolant change in response to this? Odd you wouldn't mention it before. You could understand why I would think it had something to do with your coolant flush and refill since you posted about that FIRST.
You should reread Stewart post about the thermostat.
Pull your battery cable and reset your system. Since it was temporary fault, the light should go out. It's not against the law.
So you did your coolant change in response to this? Odd you wouldn't mention it before. You could understand why I would think it had something to do with your coolant flush and refill since you posted about that FIRST.
You should reread Stewart post about the thermostat.
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Post Fiend
Joined: Mar 2009
Posts: 11,798
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From: Mt. Shasta California
The battery trick worked ! (they didn't have computers when I was a mechanic.) thanks for the info. Now I will just have to figure out where the water went which may take a while but I have been smelling radiator water for a month or so.
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
Check the carpeting under the dash. Maybe the heater core is leaking. When do you smell it the most?
The sensor must be in coolant to give an accurate reading. If yours was low it could have exposed the sensor to air, hence it telling the PCM that it is too hot.
The sensor must be in coolant to give an accurate reading. If yours was low it could have exposed the sensor to air, hence it telling the PCM that it is too hot.