Question about 2006 Chevrolet Equinox

1 Answer

P0171 and P0455 codes - What can I do to repair/correct? The check engine light keeps coming on steady. After zero out and a few hundred miles it comes back on, goes out occasional but returns. I have replaced the gas cap numerous times.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,515 Answers

Hi.

1. P0171

There are a couple things that can cause this.
First, replace the PCV valve and check for vacuum leaks.
Get some carburetor cleaner or starting fluid and spray the engine are down. If the engine revs or responds to the external fuel, you have a vacuum leak.


2. P0455

DTC P0455

SYSTEM DESCRIPTION
The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge solenoid valve OPEN and the EVAP canister vent solenoid valve CLOSED. This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or if the vacuum level decreases too rapidly, this DTC sets.

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on May 31, 2010

  • rmwavon734 May 31, 2010

    I will replace the PCV valve. I was planning to anyway. The car has 70,000 and is due oil and tune up.

    What about the P0455 code. Is it related to the first problem? Should it clear up if the PCV valve and/or vacuum leak is repaired?


  • taran_2005
    taran_2005 May 31, 2010

    Thanks for your response!!

    Yes, most of the times they are related. That is why i gave you Complete Details so you should know the main causes of the same on this Model.

    Let me know,if needed further assistance.

    Hope i helped you.

    Thanks
    for using ' Fixya ' and have a nice day!!


×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What are the probable causes of DTCs P0171, P0174, and P0455?


Smoke testing for codes P0171 P0174 - YouTube

? 5:48
www.youtube.com/watch?v=kZsqEfP-5zM
Jan 18, 2011 - Uploaded by realfixesrealfast Smoke testing for codes P0171 P0174 .... I have a 1995 ford mustang gt 5.0 and it keeps having a Fault code 176 pop up. ....Ford Explorer P0174 code intake air leak check engine light by froggy - Duration: 16:11. by froggy ...

Sep 27, 2013 | 1999 Ford Explorer

1 Answer

P0236 p0455


What is the year, make and model?
How many miles on it?

You should know that when the check engine light flashes ENGINE DAMAGE can occur!!!

Jan 17, 2013 | Volvo S40 Cars & Trucks

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

P0401 & P0171 Mazda Protege '02


It sounds like you may have an EGR valve sticking open. That can also cause the p0171 code, which means fuel system lean, and the p0401 which is insufficient EGR flow, kinda sounds like the valve may just be stuck open and not moving at all. replace the EGR valve.

Mar 05, 2012 | 2002 Mazda Protege

1 Answer

Code 171 bank 1 system running to lean?


Hi there:
DTC P0171 - System Too Lean (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.

You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.

A code P0171 may mean that one or more of the following has happened:
The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
There could be a vacuum leak downstream of the MAF sensor.

Possible solutions include:
In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
Inspect all vacuum and PCV hoses, replace if necessary
Check for a dirty fuel filter and proper fuel pressure


On rare occasions, a check engine light may be experienced with DTC P0171, P0441, P0455, and/or P2420. These DTCs may be a result of an internal PCM driver issue that may keep the EVAP purge solenoid control circuit grounded at times instead of supplying a pulse width signal on the circuit. ask your dealer and check this TSB:
#PIP3621: DTCs P0171, P0441, and/or P2420 - Inspect Production Part Number on PCM - keywords CEL check ECM EVAP lamp lean light repeat trim updated - (Nov 9, 2005)
Subject: DTCs P0171, P0441, P0455 and/or P2420 - Inspect Production Part Number on PCM

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 29, 2012 | Cars & Trucks

1 Answer

Very low miles 1995 Hyundai ELANTRA 1800 cc 16 dohc. CHECK ENGINE LIGHT frequently comes on. Stop engine, retart after light goes off...sometimes goes for hundred miles and three times new timing belt...


If the timing belt keeps breaking and bending valves, the timing belt and cylinder head repair is not being done correctly. It's as simple as that. Are you changing the tensioner and idler pullies when replacing the belt? Is it timed correctly? Was the timing belt tension adjusted properly? Were the cam journals checked for damage? If not, you are asking for another belt failure.

If you want to know why the check engine light is coming on, you will have to ask your engine computer. Every time the light comes on it is storing a fault code to tell you why. You must scan your engine control module to retrieve the fault code(s) so you can get it properly diagnosed and repaired.

Jul 04, 2011 | 1995 Hyundai Elantra

1 Answer

Hello, I asked the following question a few weeks ago and received a response that this sounded correct. We replaced the Gas Cap and the check engine light is still on after driving about 60 miles. What...


some times light wont reset self got to have it shut off autozone want shut it off but most advance auto will or disconect pos. battery cable for 30 min. it will normaly reset light

Jan 19, 2011 | Hyundai Elantra Cars & Trucks

1 Answer

72,000 miles on 2.5l turbo. check engine light on steady & cruise light keeps blinking


There could be a hundred causes for a check engine light. First step is to hook up a computer scan tool and see what codes the computer has. The next step depends on the codes.

Dec 13, 2009 | 2005 Subaru Outback

1 Answer

Check engine light flash then steady


Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with one of the components or sensors it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you need to diagnosed and repaired it. The list of possible codes number in the hundreds. The code itself doesn't tell exactly what component is defective - it only indicates where to look, or what engine parameter is out of normal range. You or a technician will have to perform further testing to pinpoint cause and the proper repair. If the light is flashing there is a severe failure of the emission-control system that is causing the engine to misfire to the point that the catalytic converter is damaged each time the Check Engine Light flashes. Even if you reset the light, if the underlying problem is not addressed it will come back on.

Apr 01, 2009 | 2001 Toyota MR2 Spyder

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

1,048 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

75807 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22133 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8172 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...