Question about Volkswagen Jetta
Hi! I have some problems my check engine light keeps coming up , i dont get hot air and my temperature gauge goes to 190 very slowly, takes me 20min driving on highway and than it starts to drop down all away to bottom. I change t stat, changed CTS, i just wonder what else could cause that! in one shop they said that wolfsburg edition has two water pums and they think one is broke down and thats why it doesnt overheat, because if i have one waterpump than it should overheat if its broke, right? So I dont know any suggestions!
There is a common fault with the cam belt driven waterpump on VAG engines as they use a plastic water-drive. The water-drive on the pump shaft breaks up or free and no longer circulates the water. Replace water pump.
Posted on Feb 16, 2012
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Posted on Jan 02, 2017
SOURCE: vw jetta 2002 code p1296/po118
Both of these codes indicate trouble with the signal from the coolant temperature sensor.
So either the sensor is bad. The thermostat is not working properly and the coolant temperature is truly way out. The wiring to the sensor is short or open. The computer is bad and it is manifesting itself through this fault.
Does the car warm up properly? If it runs hot, or takes forever to warm up, this indicates a problem with the thermostat.
If the car runs at the proper temperature the next thing to look at is the coolant temp sensor and wiring. Some resistance values for VWs are here:
You might also be interested in this recall if your car is below 100k miles:
Posted on Jan 19, 2010
The most likely cause of this is the fan not kicking on... and the best place to start looking is the fuse for the rad fan (under the dash). If this is good check radiator thermo-switch... Observe the engine as it comes up to operating temp... if the fan does not kick on by about 200 degrees, disconnect the terminals at the switch and connect them together briefly. If the fan comes on then the switch is faulty, if not then suspect the cooling fan relay. If the fan runs normally but vehicle still overheats, the next thing to check is the T-stat. Feel the upper hose when at operating temp... it should be warm... if not remove the T-stat and reassemble... if the problem goes away it was your T-stat, if not it is either a bad pump, or a restricted (clogged) radiator. If the pump is not noisy or weeping coolant, it's probably OK... Hope this helps...;-)
Posted on Apr 14, 2009
things to check...
2.make sure switch on drivers door is on (1/2"square)
3.put key in drivers door and turn/hold over, to unlock,if windows dont go down then relay at fault...
4.if all above fail get back in touch(you dont say what you have tried if anything,makes life difficult.....)
Posted on May 27, 2010
i had a mk4 golf 1.8t there basicly the same and its not that hard to do the whole front of car come off so you can work on it very easy grill off then bumper then you see the 8 or so bolts holding bash bar and whole front end on undo and you have all the room in the world if you need more detailed steps email me i have a haynes manual i could scan a few pages if you need firstname.lastname@example.org
Posted on Jun 05, 2010
last answer tonight ,this web site slows down at this time of night ,must be busy in america ,anyway usual fault for these cars take the water bottle off and their is a sensor in the bottle which sticks so with bottle removed give it a good shake till you hear the ball float shaking about then refit ,this will cure it
Posted on Jan 05, 2011
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