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Where to find engine management coolant sensor on astra 1.7cdti?

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I have 2003 astra Sri Turbo ts hatch the engine light is staying on but the car runs fine? Suggestions on what it could be?

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55 astra cdti cool/lev/warn light on,i change sensor in bottle & thermo stack

Assuming coolant level is ok the fault must surely be on the sensor side. Check wiring thoroughly, including cleanliness, terminal connections, continuity, damage, etc.. I would recommend plugging in the OBD 2 code scanner to see if you get a code fault. Also, the new sensor could be faulty (unlikely but possible) or the wiring at the back of the dashboard could be a poor connection (particularly if there is other dashboard issues). In my experience it will be something simple like a bad, dirty or corroded connection in the wiring terminals. As long as the coolant level is ok its just a minor issue!

Dec 13, 2013 | 1987 Vauxhall Astra

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My 04 astra has the engine management light on the codes are 10136 then 1614 can anyone tell me what these are please the car has recently had new lambda sensor

usually these codes are preceded by a letter and a o then the code .. ie po136 would be an oxygen sensor code ... recheck the codes as engine codes in this model always start with po ...

Oct 30, 2013 | Vauxhall Cars & Trucks

2 Answers

Electric radiator fault on Vauxhall Astra Mk4 1.7TD 1999 model

on the thermal switch there is 3 wires going into it that turns on the fan at temp and also tells the ecu what temp the engine is at. both radiators have them fitted to them.

Jul 02, 2013 | Vauxhall Cars & Trucks

1 Answer

Opel astra twinport 1.6 2006 Z16XE TURNS OVER BUT WONT START

Hi, Have a diagnostic scan done and also a mechanical error trace ,
the solution to the problem could be the CKP crankshaft position sensor or a wiring related issue, it could also be the fuel pump , the pump relay , engine management actuator . In order for your engine to start it requires the following:
Fuel pressure and volume
A proper spark
Correct valve timing and ignition timing
A decent battery vitally important as all engine management relies on it.
Hope this helps a bit
Regards Higgins.

Sep 14, 2012 | 2006 Opel Astra 1.6

1 Answer

Opel Astra Estate no spark so won't start

The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

Aug 07, 2012 | Cars & Trucks

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Vauxhall Astra 05 coolant level light comes on had it checked by garage and they have put it on the computer to reset it but still keeps coming on

Have a coolant system pressure test carried out to find out if there are any leaks in the system also replace the coolant pressure sensor as it may be faulty.

Jun 06, 2012 | 1987 Vauxhall Astra

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Vauxhall astra drives for about 5miles then goes into limp mode,rev counter drops and radiator warning light appears along with the spanner in the engine warning. leave for an hour then it drives ok for...

Unless you want to risk very expensive engine damage for what is likely to be a relatively simple and cheap repair, then do not drive the car again until you have fixed the fault.

Likely causes are as follows:-

1. A failed temperature sender. You haven't stated the year, model and engine of your Astra, but on most model it's on the side of the radiator. An easy DIY job, but on some versions the sensor replacement means you must partially drain down the coolant. Total cost around £20 for the part and replacement coolant, around £80 if done professionally in London. Costs are lower away from the South East and major UK cities.

2. A failed water pump. If it's not circulating coolant then the engine overheats. If the pump needs replacing then get the timing belt replaced at the same time as it has to be removed anyway to do the job. One of those jobs where the parts bill is relatively low but the labour charges are fairly high: total cost typically around £300 in London.

3. Blocked coolant channels in the radiator/engine block. This is highly likely if you have just been using water as it causes corrosion. Proper coolant mix not only acts as an antifreeze, but prevents corrosion and enhances the ability of the coolant to carry away waste heat. Requires a drain down, back flush, and refill with the correct coolant mixture. Typical cost around £130 in London.

4. A failed engine cooling fan. Note that if the temperature sensor has failed and it can either send false overheat signals to the engine management system to cause your problem, or it can totally fail and cause genuine overheating by failing to activate the cooling fan. If the fan does not activate when the engine starts getting hot , and the sensor has been replaced, then the fan (or an electrical connection to it) has failed. An easy DIY job, can cost under £30 DIY if you buy a used fan from a breaker's yard, or around £150 if you use new parts and get the job done professionally.

Whatever you choose to do, overheating also commonly causes cylinder head gaskets to fail. Make sure that you get a repair garage to perform a coolant test before anything else. This will instantly determine whether the head gasket has failed. It's an expensive job and starts exactly as for a timing belt/water pump renewal, but then goes further in having the cylinder head removed and then it must be checked for crack/distortion which can add a fair bit or an enormous amount to the job, depending upon what's found and whether a replacement cylinder head is required or just refacing of the existing one. With head gasket replacement it's a false economy not to replace the timing belt and water pump at the same time.even if they seem fine. Getting the coolant test will help you decide whether repairs are worthwhile, as they can cost more than the car is worth.

This list is not exhaustive, but all of the work is within the scope of a competent home mechanic (though if the cylinder head needs attention that part must be sent to an engineering shop).


Jun 28, 2011 | 2001 Volkswagen GTI

1 Answer

Where is the coolant sensor on a 93 century. 3.3 v6 I can't find where it is located. Top or bottom? Front or back?

A variety of sensors provide information to the ECM/PCM regarding engine operating characteristics. These sensors and their functions are described below. Be sure to take note that not every sensor described is used with every engine application. Coolant Temperature (ECT) The Engine Coolant Temperature Sensor (ECT) is a thermister (a resistor which changes value based on temperature) mounted on the engine coolant stream. As the temperature of the engine coolant changes, the resistance of the coolant sensor changes. Low coolant temperature produces a high resistance (100,000 ohms at 40°C/40°F), while high temperature causes low resistance (70 ohms at 130°C/266°F). The ECM/PCM supplies a 5 volt signal to the coolant sensor and measures the voltage that returns. By measuring the voltage change, the ECM/PCM determines the engine coolant temperature. The voltage will be high when the engine is cold and low when the engine is hot. This information is used to control fuel management, IAC, spark timing, EGR, canister purge and other engine operating conditions. A failure in the coolant sensor circuit should either set a Code 14 or 15. These codes indicate a failure in the coolant temperature sensor circuit.
It looks like the above, under hood, passenger side, upper engine area, mounted in front side of water outlet (according to

Oct 08, 2010 | Buick Century Cars & Trucks

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