Poor heater performance and cooling system issues.
#1
Poor heater performance and cooling system issues.
My heater on my 2k2 SE has been performing poorly this winter, taking long to warm up and to some extent just being erratic. My coolant levels turned out to be low so I topped off the reservoir. This caused some swishing noises as fluid moved through the system. I figured this was caused by air bubbles and I burped the system, all appeared well.
Soon thereafter I noticed coolant spewing out over the engine a few times when transitioning from freeway driving to city stop/go traffic. This seems to cause more air bubbles and coolant loss, I assume this is what happened before I refilled it the first time.
The pattern I noticed is that the engine temp and heater don't warm up on freeway driving, then when I take an exit and hit city traffic the engine temp jumps up to the midpoint and the heater starts to get warm. At this point I've had coolant spew out a few times.
On closer inspection it looks like coolant might be leaking out of the top seams of the radiator. I don't see any other obvious leaks, hoses, radiator cap and reservoir look good. I also inspected the fans, both look good and appear to be working when I run the AC. I am getting engine codes P0328 (Knock Sensor 1 Circuit High Input) and P0128 (Coolant Temperature Below Thermostat Regulating Temperature). I assume the P0128 has to do either with the air bubbles in the cooling system or possibly a bad thermostat? This code goes away if I burp the system and refill the coolant. As for the knock sensor, I think this indicates a rough idle, possibly stemming from poor maintenance (100k miles w/ little to no engine work other than oil changes).
My best guess is to replace the radiator and thermostat, any ideas?
Soon thereafter I noticed coolant spewing out over the engine a few times when transitioning from freeway driving to city stop/go traffic. This seems to cause more air bubbles and coolant loss, I assume this is what happened before I refilled it the first time.
The pattern I noticed is that the engine temp and heater don't warm up on freeway driving, then when I take an exit and hit city traffic the engine temp jumps up to the midpoint and the heater starts to get warm. At this point I've had coolant spew out a few times.
On closer inspection it looks like coolant might be leaking out of the top seams of the radiator. I don't see any other obvious leaks, hoses, radiator cap and reservoir look good. I also inspected the fans, both look good and appear to be working when I run the AC. I am getting engine codes P0328 (Knock Sensor 1 Circuit High Input) and P0128 (Coolant Temperature Below Thermostat Regulating Temperature). I assume the P0128 has to do either with the air bubbles in the cooling system or possibly a bad thermostat? This code goes away if I burp the system and refill the coolant. As for the knock sensor, I think this indicates a rough idle, possibly stemming from poor maintenance (100k miles w/ little to no engine work other than oil changes).
My best guess is to replace the radiator and thermostat, any ideas?
Last edited by dbavaria; 02-08-2014 at 01:04 AM.
#2
i'm having the same problem as you, minus the knock sensor thing.. i just bought a new radiator on Ebay and it only cost me 50 bucks shipped and hoping to install it sometimes next week.. i'm guessing the recent cold temperature plus the high miles on the car caused this problem, i'm sitting at around 110k as well.. hopefully this will fix it
#4
.....
The pattern I noticed is that the engine temp and heater don't warm up on freeway driving, then when I take an exit and hit city traffic the engine temp jumps up to the midpoint and the heater starts to get warm. At this point I've had coolant spew out a few times......
The pattern I noticed is that the engine temp and heater don't warm up on freeway driving, then when I take an exit and hit city traffic the engine temp jumps up to the midpoint and the heater starts to get warm. At this point I've had coolant spew out a few times......
I am getting engine codes P0328 (Knock Sensor 1 Circuit High Input) and P0128 (Coolant Temperature Below Thermostat Regulating Temperature). I assume the P0128 has to do either with the air bubbles in the cooling system or possibly a bad thermostat? This code goes away if I burp the system and refill the coolant.
....and OEM radiator cap. Good luck.
#5
Poor Heater performance
I believed you need to replace, the radiator. I just replaced mine with Koyo Radiator because the oem is expensive. The Knock sensor and Coolant Radiator Sensor must need to be replaced with oem sensors.
#6
i have these exact codes after driving in a storm yesterday
P0128 Thermostat Function
P0328 Knock Sensor Circuit High Input
I replaced the radiator with a koyo February 2015 - I havent checked the coolant levels since doing that.
Any input guys? Are these two codes associated ? I noticed the moment it came on driving in a very strong rain storm, yesterday just did a 60k tune up w belts and sparks.
I am 1000 miles over an oil change interval, but oil level is fine, checked this am.
P0128 Thermostat Function
P0328 Knock Sensor Circuit High Input
I replaced the radiator with a koyo February 2015 - I havent checked the coolant levels since doing that.
Any input guys? Are these two codes associated ? I noticed the moment it came on driving in a very strong rain storm, yesterday just did a 60k tune up w belts and sparks.
I am 1000 miles over an oil change interval, but oil level is fine, checked this am.
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