engine codes!
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Senior Member
Joined: Aug 2016
Posts: 148
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From: Richmond
engine codes!
HELP! ....losing hair / losing sleep /.......need to resolve issue SAP!
Continuing problem from engine warning light coming on and retrieved codes /well established service shop with good reputation with X Series etc. {but I am getting nervous!)
2002 2.5 AUTO /AWD /Petrol 65,000 miles
3/8/2018/ CODES P0171 & P0174....Cruise control unavailable message...
Replaced upper intake manifold upper air control valve seal.......codes cleared
Continuing problem from engine warning light coming on and retrieved codes /well established service shop with good reputation with X Series etc. {but I am getting nervous!)
2002 2.5 AUTO /AWD /Petrol 65,000 miles
3/8/2018/ CODES P0171 & P0174....Cruise control unavailable message...
Replaced upper intake manifold upper air control valve seal.......codes cleared
RAN WELL UNTIL 12/6/2018/ ENGINE WARNING LIGHT /CODE P0I71
Smoke test for leaks ....Replaced intake manifold tuning actuator seals and booster hose assembly
12/19/18 ...ENGINE WARNING LIGHT /CODE P0I71 & P0174
Suspected cause...lean condition one or more fuel injectors on each bank
Performed Engine Decarbonizing and Fuel Injection Cleaning SERVICE
Motorvac throttle body plenum and intake cleaning / Motorvac internal combustion chamber cleaning
Codes removed and drove well for next couple of days ....Engine Warning light back on with occasional Amber Light for a few minutes
Anyone have had similar problem and can suggest anything? / very appreciated.....Do I change mechanic? or just what the hell are they missing?........
Smoke test for leaks ....Replaced intake manifold tuning actuator seals and booster hose assembly
12/19/18 ...ENGINE WARNING LIGHT /CODE P0I71 & P0174
Suspected cause...lean condition one or more fuel injectors on each bank
Performed Engine Decarbonizing and Fuel Injection Cleaning SERVICE
Motorvac throttle body plenum and intake cleaning / Motorvac internal combustion chamber cleaning
Codes removed and drove well for next couple of days ....Engine Warning light back on with occasional Amber Light for a few minutes
Anyone have had similar problem and can suggest anything? / very appreciated.....Do I change mechanic? or just what the hell are they missing?........
Veteran Member
Joined: May 2009
Posts: 27,501
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From: Yorkshire, England
Change shops or DIY.
For DIY get a cheap OBD tool and use live data to see fuel trims - read forum messages about how & those codes.
Stop swapping parts at silly cost and find out what is actually wrong.
For DIY get a cheap OBD tool and use live data to see fuel trims - read forum messages about how & those codes.
Stop swapping parts at silly cost and find out what is actually wrong.
Thread Starter
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Senior Member
Joined: Aug 2016
Posts: 148
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From: Richmond
OBD TOOL PROVIDED CODES P0171 & P0174.... Mechanic hopefully has been looking "live data to see fuel trims"
what should he be doing~
update last two days engine has stayed off!>>>>>>>>>>>?
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Joined: Feb 2012
Posts: 1,113
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From: Portsmouth, England
+1 above
A common cause of those codes has been the 1 in dia crankcase breather hose from the cambox nearest the radiator to the inlet manifold. It wears and splits on its underside out of sight
A common cause of those codes has been the 1 in dia crankcase breather hose from the cambox nearest the radiator to the inlet manifold. It wears and splits on its underside out of sight
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Joined: Mar 2017
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From: Utah
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