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Code p302

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R
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Jno
Posts: 1
Joined: 9 December 2025
Year and Model: 2006xc70
Location: New York

Code p302

Post by Jno »

Got a code 305 a few months ago, replaced coil pack, now getting 302. Replaced all coils and plugs, still have the code. What now? Added fuel injector cleaner to fuel. Noticed top engine mount is loose, needs replaced. But how to troubleshoot the 302 code?
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chrism
Posts: 1307
Joined: 28 January 2009
Year and Model: S80 / 2005
Location: Atlanta, GA
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Post by chrism »

Assuming it’s misfiring on cylinder number 2…….
Swap the coil with cylinder number 1 and swap the spark plug with cylinder number 3. Clear the codes and then see what new code you get (P0301 or P0303)

Did you use Volvo/Bosch coils or another brand?
What plugs are you running?
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vtl
Posts: 4723
Joined: 16 August 2012
Year and Model: 2005 XC70
Location: Boston
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Post by vtl »

Do a compression test.
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