Compatibility : Windows 10, 8. To unlock all features and tools, a purchase is required. Toyota Echo Error Code P may be caused by a number of different reasons. This article contains information that shows you how to fix Toyota Echo Error Code P both manually and automaticallyIn addition, this article will help you troubleshoot some common error messages related to Toyota Echo Error Code P that you may receive.
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With regular use, Reimage will constantly refresh your Operating System which will keep your computer running at its best.Discussion in ' Toyota ' started by XringerJul 17, Log in or Sign up.toyota yaris po171 repair
My sister-in-law had a problem with her Echo and didn't want to bug me and took it to a gas station garage. The error code P too lean was found and the shop changed her O2 sensors.
He resets the code. Since the car needs inspection in July, and the check engine light is about half the time and the engine has been running rough and is hard to start when cold etc, she breaks down and comes to me. Since I told her I have a scan gauge now! I read the OBD code P too lean and look it up on the web.
In about 20 seconds I found out that the most likely problem is dirty sensor wires in the MAF sensor. One website even shows before and after pics of the wires. I pulled the MAP sensor off two screws and sure nuff, it was gummed up just like in the pics! One of my cans of spray stuff said 'Starting fluid'. I checked it out and it worked like a cleaner on some junk parts.
Didn't melt rubber, so I sprayed the sensor wires until they looked like new. After 50 trouble free miles, she passed inspection and today reported that her old Echo is running like when it was new. Plus, she got 47 MPG on her last tank. Here are some postings I just found. On the Echo maf unit, I also noticed another device that wasn't inside next to the others. It was off to the side and looked a bit like a thermistor. I assumed it was the Intake Air temperature.
It also needed a good cleaning. She seems to be very pleased with the better MPG now. So I'm wondering if anyone here has cleaned their maf wires up and got a boost in fe? XringerJul 17, No, but I sure will try - if I can find it. ShrekJul 17, You have to be careful with what you clean the MAF with.
Lesser preferred alternatives are: non-residue electronics cleaner, or non-residue non- chlorine brake cleaner. I make MAF cleaning a normal part of my maintenance routine every 15K miles.A misfire condition and its corresponding misfire trouble code can be the result one of many different components having failed For example, the misfire code could be caused by a bad Coil-On-Plug COP ignition coil, or a bad fuel injector, or in one engine cylinder having very low compression, and the list could go on but I think you get the idea.
The good news is that testing a misfire code, or misfire codes, or a rough idle condition is not that hard and it's something you can do! I'm also gonna' offer you a simple diagnostic strategy that will help you get to the bottom of the whatever is causing your Toyota's misfire rough idle. It'll be missing fuel gasolineor spark, or air compression. If your Toyota has two misfiring cylinders, it's not gonna' start and run and if it does Although the misfire codes don't tell you what exactly is the cause of the misfire or rough idle condition, there is a way to find out exactly what is causing it.
One of the most important things you need to know, to successfully diagnose a misfire or rough idle condition, is what causes a misfire. Let's go to the next subheading and find out.
To get to the meat of the coconut, each cylinder, in your Toyota's 1. It's when a lack of fuel, or a lack of spark, or a lack of air compression occurs, in one or several of the 1.
Let's look into more specifics:. Ignition System: The ignition system is responsible for the production and delivery of spark. The ignition system is usually the culprit behind most misfires.
P0171 2001 TOYOTA ECHO - Air/Fuel Mixture System Lean Bank 1
Testing all of the ignition system components is not hard and it doesn't require expensive tools or expensive diagnostic equipment. The following tutorial will help with what a carbon track is and how it can cause a misfire condition:. Fuel System: The fuel system is responsible for the delivery of fuel. If fuel is missing from any one specific engine cylinder, it will misfire. Engine Mechanical Condition: The pistons and cylinder head valves are the ones that draw air into the engine.
Usually all cylinders wear out evenly but every now and then, either thru' lack of maintenance or some mechanical problem, you'll have one or more wear out at an accelerated pace. To make the long story short, those cylinders with accelerated wear and tear to produce a less than average compression value that will cause a misfire condition. Page 1 Page 2. What Is A Misfire Condition? Toyota 1. All Articles: Toyota 1. Applies To:.
Status Not open for further replies. Don Minister of Fire. Feb 1, 8, Salem NH. The exhaust was leaking so, I had the front flex pipe before the catalytic converter replaced which was before the down stream O2 sensor. That helped and no light when driving around town for a couple for days, but the check engine light came back on when driving early on a cold morning on the highway.
The Toyota parts man also said that if the exhaust was a problem with the check engine light then there should be an additional error code and in my case there was no error code!!
I work at a Toyota dealership and we see this problem alot and 99 times out of it is a bad MAF. Hope this helps. Toyota probably does not want to admit it. There probably is a malfuction in the match up between the computer and the sensor feedback loop that is preventing the air and fuel ratio to be mixed properly. I would also venture to speculate that this problem involves other Toyota products other than Camry, that use this same subsystem for fuel delivery.
It turns out that the 97 Camrys have an old version computer that is related to the problem. Much appreciated was that he got the parts to be covered by Toyota and I just had to pay for the labor only. When this problem first occured I was under k but am now at k. The master mechanic said that one of the other mechanics had my same car 97 Camry and he too had the exact same problem - hesitation in power, followed by check engine light, followed by lean condition codes.
Also said that replacement of the computer and sensor resolved the check engine light from coming on but he still gets that split second hesitation in power. Hope this information helps. This might end up in the news at some point as a product recall due to defective design. I do not see any vacuum leaks so I am getting a new MAF tomorrow. Did anyone have the same error code and know what caused it? MAF sensor problem should also give you a P code, lean on bank 2. NATE said:. I'm just thinking why would bank 1 show lean and not bank 2 if the MAF is not working?
The air going through the MAF is going to both banks. I'm not a Toyota tech or even drive one, last one I owned was a 72 FJ40, but that is just my thought on it. Jan 18, N. Blocked injector?Your Toyota Echo engine control system detects a problem, the computer stores the diagnostic trouble code P in its memory.
P Toyota Echo engine diagnostic code is about in terms of how often you should get your tyres rotated, it's different for every vehicle and type of tyre, but having them rotated at every oil change is a good rule of thumb. Check with the tyre manufacturer for a more specific time frame. Remember that the more often you rotate your tyres, the more evenly they'll wear, and when you have the tyres rotated, you should also get them checked for balance and alignment. The scent may P Toyota Echo signal oil or coolant leaking from their normally closed-loop systems, or it may indicate dangerous exhaust gases invading your car's interior.
Car and truck exhaust contains toxic gases such P, so if the inside of your car P DTC For Toyota Echo as if you were standing behind your car, get out and get it fixed.
Fight the urge to take a little nap first. So sleepy. That's the carbon monoxide talking, friends. At least open a window on your way to the shop.Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists the front oxygen O2 sensor may need to be replaced. What does this mean?
The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. The mixture ratio is too lean. 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. Get Access to Factory Service Manuals. Need more help? Get the P Toyota code diagnosed by a professional: Find a repair shop in your area.
Code P0171 - System Too Lean: Symptoms, causes, common problems, diagnostic
Related Information. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P Toyota code? Have you replaced any parts? Any information is appreciated.
Repair Importance Level: 3. Why is the Engine Light ON? Home - About AutoCodes. Posted and Edit by AutoCodes.By jeffreneeJanuary 19, in Toyota Performance.
I recently have had the same problems with my 4Runner. My screws were stripped and my check engine light has not gone off after cleaning the MAF wires. I cleaned them twice with no luck. Did you ever resolve your problem? I also can confirm that the P system running too lean code was caused by an accumulation of crud on the sensors. On my Corolla the air mass flow sensor is very easy to remove 2 screws and is very easy to access. To clean the sensor I used brake cleaner which contains isopropanol, heptane and CO2 as propellant.
This cleaner, although it's for brakes, doesn't leave any residue and does a fine job of removing the deposits. In addition to the P code, I noticed also that the car hesitated slightly on acceleration; that hesitation is now gone. The air mass flow sensor as shown in the photos is probably the same for many Toyota models.
These photos were posted on a Toyota 4x4 discussion forum, yet the same sensor is used in my Corolla. The engine started with no problems and then I had the engine light remove. After driving a couple of miles the next day I finally got the engine light turned on and I will check what the code will read. This is very frustrating. Can a vacuum leak cause this problem? I had o2 sensors and catalytic coverters change to no avail before.
It ususally happens when I run the truck for long hours or long miles. I have Toyota Corolla The check engine is on and it shows the P I reset the CEL but it came back after a day.
I had this problem with yaris when I worked at a Toyota dealer find it to faulty maf sensors hope this helps.
Thanks Miniman! I think you are right, because after I cleaned the MAF, problem was solved and check engine was off but only for 2 days and CEL came on again. I think it takes a while for the computer to clean the error code becuase after 4 or 5 days CEL went off by itself! Just a bit of a tip for anyone who has the 2. You can post now and register later. If you have an account, sign in now to post with your account.
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P0171 2001 TOYOTA ECHO - Air/Fuel Mixture System Lean Bank 1
Toyota Performance Search In. Reply to this topic Start new topic. Prev 1 2 3 Next Page 3 of 3. Recommended Posts. Posted July 24, Hey Bill, I recently have had the same problems with my 4Runner.