Question about 2003 Volvo XC70

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I got the message : reduced engine power

It's appen under cruise control on highway at 115 km/h I stop the car, and the idle was very erratic. I switch off the ignition and restart and everything was all right. no message and no check engine. What was that ??? Thank Louis

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The cpu and engine management in cars is being constantly checked the same as your pc. It there are sensors that go outside set parameters ie temp speed crank timing the computer see these as possible engine failures and shuts down before major damage can be done. In you case if the vehicle runs as it should then the fault may have been simply a computer glitch ( same as your pc) that was corrected by the cpu on restarting. Be aware for a while of any unusual occurrences and have them checked out immediately.

Posted on Jan 19, 2013

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Posted on Jan 02, 2017

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SOURCE: car alarm

Try this:
1.Get in the car
2. Closw the door
3. Disable the alarm sensor
4. Activate the alarm
5. Wait 30-35 sec
6. Get out of the car
7. Stop the alaram
8. Get in the car
9. Put the key on the position II, without starting the engine
10. Push the button READ

The alarm led must blink. Then you alarm is reset.
Sorry but my english is not very good, i'm from Romania, i hope you understand

Posted on Aug 21, 2008

  • 83 Answers

SOURCE: An Arrow indicator light flashing repeatedly at intervals

Something is going on with the transmission control system. You need to find out what codes are stored in the system. Most likely the transmission range switch is failing.

Posted on Mar 25, 2009

  • 14036 Answers

SOURCE: Message ' Reduced engine performance'

sound like transmission slipping .fuel filter clogged.turbo stop woking.dirty fuel injectors.

Posted on Apr 16, 2009

  • 104 Answers

SOURCE: The car shakes while idling and the check engine

sounds like a misfire should take car to shop asap could be causing damage to car

Posted on Oct 21, 2009

  • 1 Answer

SOURCE: ''Reduced Engine Performance'' warning

I too have the same problem. Mine is a May 04 2.5T. Volvo not understand the problem because the unit does not record errors. It 'a very dangerous problem. If I'm overtaking on the motorway but the machine stops and if there is traffic is difficult to go to the right of way. Sorry for my bad english.
If anyone knows what is the problem please write me.
mgfvvc@libero.it
Enzo - Italy

Posted on Apr 04, 2010

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I changed the battery in my 1998 F150 it was running fine now it doesn't run good it acts like it doesn't want to shift and it bogs down there's no codes in the light's not on?


You can try a drive cycle, see if it helps? There may be an idle relearn, if just idle issue? Usually it will relearn idle on its own by driving.
Drive Cycle Recommendations:
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  2. Fuel tank level should be between 1/2 and 3/4 fill with 3/4 fill being the most desirable.
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STRICT OBSERVANCE OF POSTED SPEED LIMITS AND ATTENTION TO DRIVING CONDITIONS ARE MANDATORY WHEN PROCEEDING THROUGH THE FOLLOWING DRIVE CYCLES.

For best results, follow each of the following steps as accurately as possible:
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Exercised
Drive Cycle Procedure
Purpose of
Drive Cycle Procedure
Drive Cycle
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