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OBD II Scanner shows multiple random misfires and a lean 2nd bank

Tahoe service engine soon light came on and immediatly began to run horribly while pulling my trailer. Read engine codes and got multiple random engine misfires and a lean 2nd bank.

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  • Anonymous Mar 13, 2014

    engine light on what is the code P2270

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YOU MAY NEED TO CHANGE YOUR SPARKPLUGS AND PUT NEW ONES IN IT.

Posted on May 27, 2008

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ReNissan P0300


a misfire can be mechanical as well as electrical
code p 0300 is random/ multiple misfires detected
low fuel pressure is a probable cause from a problem fuel pressure regulator or problem EVAC system not venting properly causing a vacuum in the tank and starving the pump
erratic could be from valve problems on heating
loose valve seat insert/s, incorrect valve clearance from faulty hydraulic followers, cam shaft lobe failures are all part of the mechanical reason for random /multiple misfires

Oct 01, 2016 | Cars & Trucks

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Starts up but runs rough, exhaust smells, and when you give it gas it wants to shut off.


How To Fix P0300 random misfire codes in your car ...

? 2:56
https://www.youtube.com/watch?v=OyvdWeyDHf4
Feb 5, 2010 - Uploaded by Scotty Kilmer
Scotty Kilmer, mechanic for the last 46 years and counting, shows how to fix your car if the check engine light ...

P0300 - OBD-II Trouble Code - RepairPal

repairpal.com > Encyclopedia > OBD II Codes
OBD II Fault Code. OBD II P0300. Fault Code Definition. Random, Multiple MisfireDetected. Symptoms. Check Engine Light flashing; Rough running, hesitation ...

P0300 - Check Engine Light Diagnostic Trouble Code ...

https://www.engine-light-help.com/P0300-check-engine-light.html
The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the ...

Random-Misfire Page

www.random-misfire.com/

Jan 24, 2016 | Cars & Trucks

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How do i fix my Mercury Villager 2002 with random misfire?


How to Fix error code P0300 for random misfires on your car ...

diy-auto-repair.wonderhowto.com/.../fix-error-code-p0300-for-random-...
Oct 15, 2010 - How to Fix error code P0300 for random misfires on your car ... amisfire (code P0304) on a 1999 Mercury Villager 3.3L · How to Fix error code P0500 ... I reset my codes and it ran fine for a couple of days, then I started getting ...

(code P0305) on a 1999 Mercury Villager 3.3L - auto repair

diy-auto-repair.wonderhowto.com/.../troubleshoot-misfire-code-p0305-1...
Sep 7, 2010 - The vehicle is a '99 Mercury Village, 3.3L, with 150000 miles on it. The chief ... How to Fix error code P0300 for random misfires on your car ...

2000 Villager Misfire - Car Forums and Automotive Chat ...

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May 24, 2010 - 2000 Villager Misfire Villager Car Forums. ... i was told that the 3.3L engines of 1999-2002 nissan quests/ mercury villagers are INTERFERENCE engines! ... Hope the following may help, and I will post if my last fix works. ... I have a 1999mercury villager that is showing a random multiple cylinder misfire ...

Rough Idle - 2000 Mercury Villager - RepairPal

repairpal.com > Questions > Mercury > Villager > 2000 Mercury Villager
Repair the code issue, because your Villager has OBD-II which is a very helpful Diagnostic system. Upvote (4) ... My 1999 Villager was running poorly; rough idle, lack of power at highway speeds and the engine problem light indicated random miss-fire, etc. I had new spark ... Have code po306 cylinder 6 misfire detected.

P0301 - OBD-II Trouble Code - RepairPal


Dec 17, 2015 | 2002 Mercury Villager

1 Answer

What should I check with 3 codes P0051 , P0300, P1512 .its only car I have and I need expert advice what's smartest cheapest thing to do?


the following link is courtesy of obd codes .com the p0300 misfire code can be from the other to codes P0051 - Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 2 Sensor 1) OBD-II Trouble Code Technical Description Generic: Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 2 Sensor 1) Nissan: Heated oxygen sensor (HO2S) 1 Bank 2 - heater voltage low What does that mean? A P0051 DTC (diagnostic trouble code) refers to the O2 sensor (oxygen sensor) located on Bank 2 in front of the catalytic converter. There is also an oxygen sensor behind the converter which is Sensor #2. This O2 sensor #1 may also be refered to as an air/fuel ratio sensor since on some vehicles it is. It detects the amount of oxygen in the exhaust gas compared to the outside air and then vehicle's computer adjusts the air/fuel ratio going into the engine. The sensor is less effective when the exhaust gas temperature is low, so it includes a heater which is activated to help get better readings from the A/F O2 sensor. Essentially this P0051 code means that the resistance of the heater circuit is lower than normal. In most cases, that resistance level must fall below 0.8 A to trigger the DTC code. Note, this code is very similar in nature to P0031, P0032, and P0052 Potential Symptoms Most likely you'll not notice any symptoms other than the MIL (malfunction indicator lamp, a.k.a. the check engine light) will illuminate. Causes A P0051 DTC trouble code may be caused by one or more of the following: A short in the heater circuit in the sensor A failed O2 sensor heater Wiring/connectors broken/frayed leading to sensor and/or relay Failed PCM/ECM Possible Solutions To fix a P0051 DTC code, you'll need to do a proper diagnosis. To do that, you'll want to inspect the wiring and connectors leading to the sensor. Also if equipped with a heater relay and fuse, you'll want to check those as well. Use a digital volt ohm meter to: check for 12 volts at the heater circuit feed (hint: unplug the sensor and check at the wiring connector to do this measurement) check the ground circuit for continuity measure the resistance of the heater circuit (done on the sensor itself) measure the resistance and voltage of the wiring Refer to a service manual for the correct specifications (volts, ohms) for your vehicle. On some Toyota vehicles this code is triggered when the resistance of the heater circuit is below 0.8 A. With that said, a common fix for this DTC is to replace the air/fuel (O2 oxygen) sensor #1 on bank 2 (the side of the engine that doesn't contain cylinder #1). Please keep in mind that OEM (original equipment) replacement sensors are recommended (from the dealer). Aftermarket sensors can be less reliable and of poorer quality (not always, but more often). There's also a chance that replacement parts for the P0051 code may also fall under a federal emissions warranty (check with your dealer to see if it's covered).

Read more at: http://www.obd-codes.com/p0051
Copyright OBD-Codes.com OBD Codes Your OBD-II Trouble Codes Repair Site Home Trouble Codes FAQs Forums Store P0300 Diagnostic Code - Random Misfire Technical Description Random/Multiple Cylinder Misfire Detected What does that mean? Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly. A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why. Symptoms Symptoms may include: the engine may be harder to start the engine may stumble / stumble, and/or hesitate other symptoms may also be present Causes A code P0300 may mean that one or more of the following has happened: Faulty spark plugs or wires Faulty coil (pack) Faulty oxygen sensor(s) Faulty fuel injector(s) Burned exhaust valve Faulty catalytic converter(s) Stuck/blocked/leaking EGR valve / passages Faulty camshaft position sensor Defective computer Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back. If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors. Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open. It is helpful to have access to a factory service manual and an advanced scan tool to properly diagnose a random misfire DTC. P0300 Diagnostics Video Here is a helpful video that may assist you in learning more, diagnosing, and repairing your P0300 DTC. This video is intended for auto repair professionals but could be helpful to DIYers. It shows use of an advanced OBD-II scan tool during diagnostic steps:

Read more at: http://www.obd-codes.com/p0300
Copyright OBD-Codes.com
http://www.obd-codes.com/search/?cx=006282753923640923292%3Absyyn-_1vle&cof=FORID%3A11&ie=UTF-8&q=p1512&sa=Search&siteurl=www.obd-codes.com%2F&ref=&ss=1863j1029425j5 Engine-Codes OBDII Code List P1512 Mazda
P1512 Mazda P1512 Mazda - Variable Tumble Control Solenoid Stuck Closed 0 ' Add Comment Possible causes
- Variable Tumble Control Solenoid (VTCS) vacuum solenoid stuck closed
- Faulty Variable Tumble Control Solenoid (VTCS)
- Variable Tumble Control Solenoid (VTCS) harness is open or shorted
- Variable Tumble Control Solenoid (VTCS) circuit poor electrical connection
What does this mean? When is the code detected?
Variable Tumble Control Solenoid (VTCS) Dual Plane Intake system
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)

Read more: http://engine-codes.com/p1512_mazda.html#ixzz3ihjeps00

Aug 13, 2015 | 2000 Mazda MPV

2 Answers

Engine codes po300,po420,po430,po446 is what codes poped up when hooked up on computor.


300 is multiple cylinder misfire, 420 is catilytic convertor no good and 446 is an evap problem

Feb 06, 2011 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

Engine misfire first 1000 rpm, engine flooding out, check engine light is on but flashes when in motion, scanner shows system too lean bank 1 and 2. shows multiple cylinder fault codes.. (FORD F-150...


my 2002 ford f150 4.2 would not hold idle so we changed the fuel pump and fuel filter and relay now the truck starts holds idle runs good at low rpm but when i stomp it it runs then stalls and picks up again.

Dec 05, 2010 | 2002 Ford F150 Regular Cab

3 Answers

2003 Ford Ranger 4x4 extended cab- diagnostics checked and got these codes- P0171, P0174, P0300, P0316. Can you tell me what they mean?


P0171------ system too lean bank#1
Po174------ system too lean bank#2
For these 2 codes, try cleaning the maf sensor (mass air flow), that is mounted in the big black hose that goes from the air filter housing to the throttle plate, if it is dirty, that will cause those 02 sensors to send a signal to the computor to lean the air fuel mixture. If cleaning it doesn't work, the sensors will probably need changing.
P0300---- Random/multiple cylinder misfire
P0316---- Cylinder misfire at start up---- first 100 revolutions.
On those 2 codes, you have to do some testing to find out why there is a misfire.
Possible causes:
dirty/malfunctioning injectors
weak coil pack
fowling spark plugs/wires
Low fuel pressure

May 11, 2010 | 2003 Ford Ranger Regular Cab

1 Answer

I have a 318i 1998, the engine light came on. i hook up my obd scaner to it and the trouble codes are as follows p1174 (fuel trim adaptation additive bank 1 malfunction,po300 (random/multiple cyl. misfire...


Sounds like it may be running a bit lean - do basic checks for air leaks in the induction system (such as leaking manifold gasket, loose hose fittings to air flow sensor etc).
Condition of HT leads also worth a check.

Jun 07, 2009 | 1999 BMW 318 ti

2 Answers

98 camry engine light on w/misfires & system too lean


take sample of your fuel into clear plastic bottle from fuel line
is there any water present?
this can cause these codes and then not go on storing codes for other bank even though that bank will be missfiring also due to water & P0300 Random/Multiple Cylinder Misfire Detected being logged
check all connections to coils/leads & wiring connectors
due to miss fire codes for cyl 1,3,5 all on the same bank
also look and check for air leaks on that bank (hose knocked off or splithose)inlet manifold gasket,brake booster etc...
3 injectors being blocked slightly on same bank posible!!!
check wires and signal

was it running like this b4 tune up & repairs?
this is what codes are
P0170 Fuel Trim Malfunction (Bank 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0305 Cylinder 5 Misfire Detected

the last code is for trans due to misfire/running lean on bank 1 probably a torque problem code
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May 29, 2009 | 1998 Toyota Camry

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