Coolant leak
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Coolant leak
There is coolant leaking out from under my car today and i thought it may have been the hoses where they go into the firewall since i just replaced the rear motor mount and undid those but it was instead coming out from under my car on the passenger side so i pulled back the carpet and it was soaked. Is it the heater core or could there be something else wrong? I do have a check engine light on for the past couple days and it is the oxygen sensor heater...anything to do with it?
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Honda-Tech Member
Joined: Apr 2004
Posts: 192
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Re: Coolant leak (shamoo)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shamoo »</TD></TR><TR><TD CLASS="quote">Hmm, coolant doesn't go through the firewall.
It could be the A/C line that's clogged. Check that.
What code is your engine light throwing?</TD></TR></TABLE>
Not trying to argue but when i took the hose off the firewall it was all antifreeze and it has to go into the heater core...it shows it in my haynes book. The code is the "oxygen sensor heater"...whatever that may be. It flashes 4 times slowly then once fast.
It could be the A/C line that's clogged. Check that.
What code is your engine light throwing?</TD></TR></TABLE>
Not trying to argue but when i took the hose off the firewall it was all antifreeze and it has to go into the heater core...it shows it in my haynes book. The code is the "oxygen sensor heater"...whatever that may be. It flashes 4 times slowly then once fast.
Will you make something up for me please?
Joined: Sep 2001
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From: SoCal
Re: Coolant leak (Gsr94black)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gsr94black »</TD></TR><TR><TD CLASS="quote">
Not trying to argue but when i took the hose off the firewall it was all antifreeze and it has to go into the heater core...it shows it in my haynes book. The code is the "oxygen sensor heater"...whatever that may be. It flashes 4 times slowly then once fast.</TD></TR></TABLE>
Argh, you're right. Sorry, I was thinking of something else entirely.
Not trying to argue but when i took the hose off the firewall it was all antifreeze and it has to go into the heater core...it shows it in my haynes book. The code is the "oxygen sensor heater"...whatever that may be. It flashes 4 times slowly then once fast.</TD></TR></TABLE>
Argh, you're right. Sorry, I was thinking of something else entirely.
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Re: Coolant leak (Gsr94black)
Code 41... The O2 sensor has a built-in heater, that's 2 of the 4 wires on the sensor. It needs battery voltage from the main relay, & the ground side goes to the ECU. I don't remember whether it has it's own fuse...
Got a multi-meter? Unplug the sensor. The heater element should be between 10 to 40 ohms. All other combinations of terminals (on the sensor) should all be open-circuit. None of the 4 terminals should have any continuity to ground.
Maybe coolant dripping on the sensor or the plug has messed it up??
The heater valve is on one of the heater hoses, just outside the firewall. Maybe that's leaking? But if it also leaks coolant inside the car, look at the heater core. That's probably a PITA to get out. Even if it's simply a loose hose clamp...
Got a multi-meter? Unplug the sensor. The heater element should be between 10 to 40 ohms. All other combinations of terminals (on the sensor) should all be open-circuit. None of the 4 terminals should have any continuity to ground.
Maybe coolant dripping on the sensor or the plug has messed it up??
The heater valve is on one of the heater hoses, just outside the firewall. Maybe that's leaking? But if it also leaks coolant inside the car, look at the heater core. That's probably a PITA to get out. Even if it's simply a loose hose clamp...
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