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P0171 P0172 P0301 P0302 P0303

Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. In this forum you'll find S40/V40-specific owners asking and answering questions on maintenance, ownership, repairs, tutorials and almost every do-it-yourself thing you can do to save money owning these Volvos.

1996 - 2004 S40
1996 - 2004 V40
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rhlee222
Posts: 51
Joined: 4 February 2012
Year and Model: S80 2001, S40 2001
Location: Nashville, Tn. USA

P0171 P0172 P0301 P0302 P0303

Post by rhlee222 »

Hi Everyone,
Today my wife started her car after it sat for a couple hours and It didn't want to idle. I went out and drove it and after a minute or so it ran fine. She drove it to work. After sitting again for 2 hours it wouldn't idle. She drive it home, and it threw a check engine light. I pulled the codes and drove it. It runs great. It threw the above codes. It's too late to check but I'm thinking vacuum leak. Any other ideas will be greatly appreciated.
As an added thought, I replaced her Catalytic converter around 10 days ago. It went bad after my daughter drove it on failing plugs and wires, which caused misfires. Everything was fixed prior to replacing the cat, but it was an aftermarket cat.

Thanks,
Rick
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rhlee222
Posts: 51
Joined: 4 February 2012
Year and Model: S80 2001, S40 2001
Location: Nashville, Tn. USA

Post by rhlee222 »

Figured it out. There's a hose on the coming off the air cooler sitting on top of the radiator called an idler hose. Broke clean in 2.
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