Service Issues: - 2004 V70 - "Check Engine" light

davidqtn · Nov 10th, 2014, 17:35

My 2004 Volvo V70's check engine light came on, indicating a problem with the "Ambient Air Temperature Sensor". Since the dash is recording the correct outside temperature, I replaced the sensor in the driver's side mirror (left) - but the check engine light is still on. Will the light eventually clear itself, or do I need to take it someplace to have the code cleared? I have only driven the car about 30 miles since the repair was made.

David

ASt85 · Nov 10th, 2014, 17:59

You could try a cold reset by disconnecting the battery ten minutes after turning the ignition off. Cross connecting the vehicles +ve and -ve battery connection cables for a few seconds, and then re-connecting the battery.

Remember to put the ignition key back in the lock and turn it to Position 2 BEFORE YOU RECONNECT THE BATTERY - it helps prevent the spike when you reconnect the battery triggering the air bags - in any event, make sure nobody is sat in the front seats when you reconnect the battery.

If that doesn't work - beg or borrow a code reader e.g. an Autel or Dice that will clear and reset the codes.

Nov 10th, 2014, 17:35	#1
davidqtn New Member Last Online: Nov 11th, 2014 14:10 Join Date: Nov 2014 Location: Dallas	2004 V70 - "Check Engine" light My 2004 Volvo V70's check engine light came on, indicating a problem with the "Ambient Air Temperature Sensor". Since the dash is recording the correct outside temperature, I replaced the sensor in the driver's side mirror (left) - but the check engine light is still on. Will the light eventually clear itself, or do I need to take it someplace to have the code cleared? I have only driven the car about 30 miles since the repair was made. David

Nov 10th, 2014, 17:59	#2
ASt85 Premier Member Last Online: Apr 26th, 2024 08:06 Join Date: Aug 2010 Location: Walderslade....Kent	You could try a cold reset by disconnecting the battery ten minutes after turning the ignition off. Cross connecting the vehicles +ve and -ve battery connection cables for a few seconds, and then re-connecting the battery. Remember to put the ignition key back in the lock and turn it to Position 2 BEFORE YOU RECONNECT THE BATTERY - it helps prevent the spike when you reconnect the battery triggering the air bags - in any event, make sure nobody is sat in the front seats when you reconnect the battery. If that doesn't work - beg or borrow a code reader e.g. an Autel or Dice that will clear and reset the codes. __________________ The saddest moment is when the one who gave you the best memories....becomes a MEMORY V70 SE 2004 2.3L T5 Geartronic, C70 2005 2.0T Automatic, Sold 2.4l 20 Valve Automatic Torslander Sold 854 GLT 20v Auto

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