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2006 Chevy HHR check engine light came on had code P0171. Replaced gas cap and front Oxygen sensor. After 60-80 miles light comes back on. engine is hard to start. Will crank on the third try.

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6ya6ya
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Posted on Jan 02, 2017

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egadgetguy
  • 258 Answers

SOURCE: 2006 Chevrolet HHR LT Problem

After searching around, I found several posts that suggested reseating all the relays and fuses under the hood. After checking, I noticed nearly all of them were not seated well. I pushed them all down and I haven't had the problem since.

Ken

Posted on Jan 09, 2009

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  • 140 Answers

SOURCE: 1999 Chevrolet S-10 Check Engine Light

YEAH MAN I KNOW WHAT YOU ME, THOSE DARN COMPUTER ARE WAY TO SMART.. THERES NOTHING WRONG, BUT YOU CAN TAKE THE TRUCK TO A GM DEALER AND THEY CAN FLASH THE COMPTUER, BUT THE ONLY DOWNFALL IS THAT THE CHECK ENGINE LIGHT WILL NEVER WORK AGAIN.. SO ITS YOUR CALL..GOOD LUCK KEITH..

Posted on Mar 12, 2009

Tech jk
  • 102 Answers

SOURCE: on a 2006 chevy impala it tells you to tighten the gas cap

There is no sensor for a loose gas cap. What is happening is that the evaporative emission system is sensing a "Large Leak". Usually code p0455. The computer sees this as the most probable cause is a loose gas cap depending on several factors it looks at. You would need to clear the code(s) and see if that was the problem. If the light comes back on, then you have a problem in the system that will not let it seal. Possible solenoid problem, leaking hose / line, etc.

Posted on May 08, 2009

nate6556
  • 103 Answers

SOURCE: 2004 colorado code p0172

check your gas cap. If you fill your gas while the vehicle is running, it will also cause your light to come on. Go to OReilys or Autozone and they will shut it off for free and tell you the problem

Posted on Jul 25, 2009

  • 7353 Answers

SOURCE: 06 chevy impala v6 3.9 liter engine. Check engine

there is a large evaporative leak. keep away form ottozoo, they dont have the brain power to actually diagnose a light bulb., their job is to sell parts., if they sell you the wrong parts tough.Take it to a qualified repair shop that does a lot of GM work or the dealer.

Posted on Sep 25, 2009

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2000 toyota alvalon check engine light keeps coming on for code p0171 after replacing 02 oxygen sensor in bank 1


code p 0171 refers to system too lean bank 1===causes ---intake /exhaust leak---AIR system---MAF/VAF sensor/s---fuel pressure/ pump---injector/s---heated oxygen sensor (HO2S) the one in the exhaust manifold for bank 1 nearest the firewall

Apr 15, 2017 | Toyota Cars & Trucks

1 Answer

Code P0171


P0171 - System Too Lean Bank 1 Share
1 ' Add Comment Possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
What does this mean? Tech notes
If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.
What does this mean? When is the code detected?
- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
P0171 Description
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the Malfunction Indicator Light (MIL) (2 trip detection logic).
Read more: http://www.autocodes.com/p0171.html#ixzz3t65yA9xI

Dec 01, 2015 | 2004 Nissan Titan

2 Answers

2006 Chevy hHr check engine light keeps coming on it failed smog it said it needed coolent temperature sensors I fix that now engine light still on now mechanic says it needs more sensors


If he didn't clear the computer fault codes the light will come back on. Usually the light will go off after about 30 miles of driving after the problem is fixed if the codes were not manually cleared. Take your car to another mechanic.

Mar 11, 2015 | 2010 Chevrolet HHR

1 Answer

Fault code p0171 what the problem


P0171 - System Too Lean Bank 1
Possible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech notes If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.

Oct 09, 2012 | 2001 Renault Sportwagon

1 Answer

Volkswagen jetta code P0171


P0171 VOLKSWAGEN - System Too Lean engine cylinder Bank 1
Possible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
P0455 VOLKSWAGEN - EVAP System (fuel vapor storage and control) Large Leak Detected
Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking

Aug 09, 2012 | Volkswagen Cabrio Cars & Trucks

1 Answer

Ive been having issues with my 2001 tacoma pre runner. The check engine light goes on and off. It read a P0171. I replaced spark plugs and MAF sensor. Light has not come back on again but engine still...


That code is P0171= system too lean (bank 1). The computer is reading a lean condition and is trying to richen up the mixture but is unable to fully compensate for the condition. That is why the engine is running so rich and you are losing mileage. You should be looking for an air leak in the intake system after the MAF, a vacuum leak into the intake manifold, or an exhaust leak at the exhaust manifold gasket or some where above the oxygen sensor. The O2 sensor is seeing excess oxygen that is unaccounted for by the MAF.

Feb 04, 2011 | Toyota Tacoma Cars & Trucks

2 Answers

Oil CAP Not placed after Oil Change by CARx Engn Light on P0171


Well an engine vacuum leak can cause the P0171 code to come on and having an oil cap missing is a vacuum leak. The first response for this code is to replace the O2 sensor because that is what the code is for...bad O2 sensor reading. Now too much air from a vacuum leak can cause a lean condition in the exhaust. If they are going to replace the O2 sensor for free then let them..If you trust them to replace it. It is possible that the lean condition could have damaged the O2 sensor. You may find that after a few days of driving with the cap back on the check engine light might go back off. I do not think anaything would be permanently damaged as long as the oil level did not get too low and nothing got into the engine thru the open hole in the valve cover. Does the car seem to be running ok? No overheating, miss, ect.

Nov 25, 2009 | 1998 Toyota Camry

3 Answers

Just bought a 2006 chevy trailblazer. the engine light kees coming on. checked and replaced 2nd cylander coil. drove 150 miles engine light came ack on


I suppose the engine code said that cylinder was not firing or faulty? I would immediately get a compression check done on the engine. It is relatively painless. My burnt valves (compression 10psi vs 150psi) could not be diagnosed any other way. Does this help?

Jul 05, 2009 | 2004 Chevrolet TrailBlazer

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