I have been working with an 850 GLT 2.4 Turbo for the last year. This vehicle had an EVAP problem when I bought it. AND, I ended up doing a head job on in it. After my daughter let it get to hot. You first need to buy or rent a OBD-II scanner tool. these can be rented at a local parts store. Run the code test and it will give you a code.
My experiences have been the EVAP and Coolant problems.
If it is the EVAP issue then you need to look at the fuel tank to see if there is a leak present. There is a recall on the fuel tank if it is leaking on the upper side next to the tail pipe. There is also a a few lines that could be leaking in the fuel and secondary air system. Just a simple crack can cause this. In this case don't waste any money take it to a certified repair shop and have a smoke test accomplished. Then it will be pin pointed real quick and easy. This could run from $75-$150. DEPENDING.
Codes encountered- P0442
Coolant issue: There are many reasons here. Leaking head gasket, bad temperature sensor, temp relay, coolant fan, etc. You can do a few simple tests. The head gasket is a little involved. A scale on working skill 1-5. I would put it at a level 3 or 4 depending on your knowledge on how to work on cars. If the water container is low. Fill as recommended by manufacturer. Drive around and look to see if quantity has gone down. If it has you can purchase a coolant test kit from Harbor Freight accomplish test from Haynes manual or ALLDATADIY.COM. Removing all spark plugs and pressurizing the system, You will see or here water bypassing into cylinders or outside the head. The engine will not use water at idle sitting still you have to drive the vehicle. Very expensive if it needs shop work. Bad temp sensor: My encounter was engine would start cold and hard start while warm or hot. This could be a wire problem. Fan Relay you have to listen when fan runs at idle and after driving. read Haynes manual for explanation. There is a sensor in the tank. Always make sure this existent. This item could cause you great heart ache.
Codes encounter- P0117
Recommendations: If you are going to keep this vehicle for a while I recommend the ALLDATADIY.COM site. Very inexpensive and worth it as a guideline. This is a shop repair manual and some test you have to compensate for. Also the Haynes Manual. Also recommend if you replace the head gasket use only Volvo parts.
Reminder: Parts on this vehicle are very expensive.
in your tranny fluid check tube you will need a funnel
To bleed the cooling system on a 1991 Volvo 940SE Turbo, first ensure the engine is cool and then remove the radiator cap. Start the engine and let it idle, allowing the thermostat to open, which will enable coolant flow. As the engine warms up, check for air bubbles in the radiator; if present, rev the engine slightly to help expel trapped air. Once the bubbles cease, top off the coolant reservoir to the recommended level and replace the radiator cap securely.
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One way that always works is to disconnect the battery for at least ten minutes. If the cause of the check engine light turning on in the first place is not fixed, then the light will come on again pretty quickly after starting the car.
A check engine light displaying on a Volvo V40 means maintenance is needed on the car. Check the car's instruction manuals to see each mileage checkup recommended by the manufacturer.Ê
Engine check urgently
I have a 2001 Volvo S60 Turbo. My Volvo has two oxygen sensors. Both are in the exhaust system. The first is in the exhast pipe, close to the engine (it looks like a spark plug). The second one is in the catylitic converter. I had mine checked at Autozone (local auto parts store). I am having trouble disconnecting the electrical wire. In any event, if you replace the sensor, the code will have to be reset in order to extingish the check engine light. Autozone said that they can reset.
To read codes on a 1989 Volvo 760 with a 2.3 turbo, locate the diagnostic connector under the dashboard near the driver's side. Use a jumper wire to connect terminals A and B on the connector. Turn the ignition key to the "on" position without starting the engine, and the check engine light will blink the trouble codes in a sequence. Count the blinks to identify the codes, referring to the vehicle's service manual for their meanings.
check the hose from the turbo to the air mass meter on the bottom of it may be burst very common repair or replace.
No, diesels don't have O2 sensors.
Did you try unhooking the battery
check oil pressure and oil volume going to turbo make sure the oil return is not clogged are youletting you car idle 10 minutes after every use you cant be running 2 bar of boost and just turn off your engine you need a tubo timer to cool down your turbo or you will fry your seals if you email with a little more info on your setup llike make engine turbo is it watercooled?? i can help you better g