Question about Volvo S70

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I PUT MY SCANNER ON MY 99 VOLVO S70.CODE P1081 COMES UP.WHAT DOS THAT CODE MEAN?

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  • sherrellb40s Jun 20, 2010

    WHAT DOS CODE P1081 MEAN FOR VOLVO S70?THANKS

  • sherrellb40s Jun 21, 2010

    WHAT DOS CODE P1081 MEAN.FOR 99 VOLVO S70?THANKS

  • sherrellb40s Jun 23, 2010

    IM GETTIN CODE P1081 ON MY VOLVO S70. THE CAR WILL RUN GOOD SOMETIMES.BUT CUT OFF AND TAKE AMIN TO START BACK UP.I U CAN HELP ME THANKS. SORRY IT A 99

  • sherrellb40s Jun 23, 2010

    I HAVE A 99 VOLVO S70 THAT CODE P1081 COMMIN UP IN MY SCANNER. RIDE GOOD SOMETIMES.BUT IT CUT OFF AND TAKE AMIN TO START BACK UP WHATS THE PROBLEM?THANKS AND HOW TOO CLEAR IMMOBILZER CODE? THANKS

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May be a problem with the Lambda Sensor(O2) and or the IAC Motor, many times the air/fuel mix is offset too lean or too rich by the Idle Air Control Valve which gets stuck and carboned up not allowing the pintle to move on/off its seat to allow ther proper mixture of fuel and air through it for a lean or richer burn, that P0181 code you are getting is clasified as a Fuel Temperature Sensor A Ckt Range/Performance.
Which can be set having a defective IAC motor and or Lambda Sensor which meters the fuel mixture in the exhaust pipe before entering the catalyctic converter.
If you are not savvy on the computer systems especially on these vehicles it may pay to have them estimated for repair by the dealership. defect.

Posted on Jun 23, 2010

  • JOHN DAVIDSON Jun 23, 2010

    As for the immobilizer code clearing, this should be done by only using a OBDll scanner it clears the codes without giving the ECU,ECM, PCU, what ever you want to use as reference to the Electronic Control Module better known as the Computer, if you disconnect the battery the ECM will get what we call in the shop as a "lobotomy" of the memory, which requires you to drive the car all over at all different speeds giving the computer its drivability information back as it was before you cleaned the power out, using the scanner will only clear the codes and not disrupt anyother factors that is why it is advisable to only use a scanner for this treatment!

    Happy Motoring!!

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Code 1081 = Immobilizer Communication, No Communication.

Clear code and see if it returns.

If Intermittent Fault:
The engine control module (ECM) has previously detected a fault in the communication between the immobilizer and engine control module (ECM).

Hint: This diagnostic trouble code (DTC) is stored when the car is left standing with the ignition on for too long. The ECM then requires a new approval code from the immobilizer. When the engine is next started, the immobilizer will be in the diagnostic mode. The immobilizer goes into the diagnostic mode if there has been diagnostic communication between the immobilizer control module and the engine control module and the engine is started without the ignition being switched off first.

Visually check the immobilizer terminals and connections.

Check the signal cable between engine control module terminal #B22 and immobilizer terminal #4 for an intermittent open-circuit.

Check for an intermittent short-circuit to ground.

Check for an intermittent short-circuit to supply voltage.


Posted on Jun 21, 2010

  • PokeyOkie
    PokeyOkie Jun 23, 2010

    Have given you specific things to test. Have you performed these tests and if so what the results?

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I had code p 1081 after when would eng crank but no start. But evantually start.
Now car is cranking but not starting at all. No codes shows error after scanning....

Posted on Apr 25, 2014

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Hi! Its the immobilizer code. You will have to reset it to clear it out. Hope this helps and have a good one!

Posted on Jun 23, 2010

  • sherrellb40s Jun 23, 2010

    YES HOW DO I RESET THE CODE?

  • dj_relly999
    dj_relly999 Jun 23, 2010

    Try disconnecting the positive terminal of the battery and let it sit for atleast 10mins. Reconnect the battery and see how it goes.

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HI. The code(P1081) is in reference to an Immobilizer Communication Failure. The possible causes are as follows:


A. Ignition has been switched on and off more than 3 times while driving
B. Incorrect key used for starting the engine.
C. Open circuit in signal cable at the module
D. Defective engine immobilizer control module
E. Defective ECM


  • NOTE_ This is what we call a dealer code, unfortunately. The only way to diagnosis correctly will be to allow the dealer to use a break out box analyzer. There may be an independent shop in your area that may possibly have this Volvo break out box tool, but I doubt it. This is an exclusive tool only used by Volvo dealerships.


Posted on Jun 20, 2010

  • Michael Masters
    Michael Masters Jun 21, 2010

    I just told you what that code means....... What are you expecting?

    There are no alternative definitions to that code....

    ridiculous....


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P1081 Is an immobilizer code. Did the check engine light come on and then you decided to read for codes? Or did you just read for codes and this p1081 came up?

Posted on Jun 20, 2010

  • sherrellb40s Jun 20, 2010

    WHEN I GOT THE CAR WHEN U START IT IT WOULD CUT RIGHT BACK OFF. SO THATS WHEN I PUT MY SCANNER ON IT.THE COOLANT TEMP SENSOR CODE CAME ON TOO. I CHANGE IT.BUT IT WAS SHOWIN CODE P1081 AS WELL.SO IT WILL RUN FOR A FEW MINS. THEN CUT OFF.

  • GetMeOttaHere Jun 20, 2010

    That is an immobilizer code. I would suggest starting with a stone cold engine and take it for a drive . There is a proper drive sequence but sometimes it's hard to hit. With a cold engine (overnight) take it for a normal 2 to 5 mile drive on open straight road at 55 to 60 it will probably clear this code.

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