Question about 2000 Mercury Mountaineer

1 Answer

Engine light on, vehicle usually won't start. engine light code is o2 sensor

The vehicle will only OCCASIONALLY start. engine light diagnostic done and came back with an o2 sensor replacement needed. Would an o2 sensor cause the vehicle to no crank? I conducted a batter test (good) alternator (good) and spark plugs (good) starter also (good)

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  • Anonymous Dec 08, 2012

    I'm sure about Barney but you oxygen sensors won't cause your problems,that was your question. They are for adjusting fuel control once the veh has warmed up. You need a repair shop to diagnose the ocassional no start. I think your going to have a problem convincing a shop you have issues. i know you do but can't guess at the solution,need the truck to do some testing

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1 Answer

The oxygen sensor won't stop it from cranking or starting

Check for spark or injector pulse when cranking

Check fuel pressure at the motor shrader valve with a gauge
KOEO

Posted on Dec 08, 2012

  • C-dub
    C-dub Dec 08, 2012

    Not too belittle myself, but i'm not extrememly mechanicly inclined. anatomy of a human, got it......anatomy of a vehicle not so much. Could you break what you said down Barney style please

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Posted on Jan 02, 2017

  • 2418 Answers

SOURCE: My mountaineer won't start.

If the engine is turning, but slow, she may need the battery terminals cleaned, if it has sat for over a year, yes, it may need a new battery. If the engine is turning over and she is not cranking up. Standard rules apply... does she have fuel? does she have spark, does she have compression? First thing is easy, get a can of starting fluid and give her a spray in the air filter area during cranking, if she pops off you have spark, which means no fuel. If it does not try to hit, that means no spark and more trouble shooting will need to be done. If it starts on starting fluid, you may have a bad fuel pump. AS gas turns to gunk as it dries up. And that may have gummed up the pump and filter. Hope this helps FixYa up.

Posted on Sep 12, 2011

jturcotte
  • 7768 Answers

SOURCE: code p0301 misfire cylinder#1 and O2 sensor B1-S1

here is the o2 sensor diagram.
jturcotte_1753.gif

Posted on May 23, 2011

Blackberry_U
  • 223 Answers

SOURCE: Misfire on Cyl #2

How is your oil filter? It might be plugged...

Posted on Jun 01, 2009

warlock61
  • 659 Answers

SOURCE: 2000 Mercury Grand Marquis

if the moisture was on the outside of the plug most likely water got into the hole. this causes high stress on the coil and causes them to break down. If the plug was replaced and the symptom returned
i would replace the coil.

Posted on Dec 21, 2008

  • 435 Answers

SOURCE: my battery light is on

Sounds like your voltage regulator is acting up, and at times will not let alternator voltage reach the circuit. At this point car stars drawing on battery alone (triggering battery light) and working until it is out of juice. Before you buy a new voltage regulator, make sure that its contact points on the alternator, and the plug from it to the vehicle circuit is clean, shiny and making good contact. These parts, due to their location tend to collect dirt and moisture, leading to an intermittent performance before they stop working completely.

Posted on Oct 02, 2010

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1 Answer

What could cause my bank 1 O2 sensor to keep going bad


For the code pulled was diagnostic trouble code diagnostics done or was the O2 sensor just replaced > What was the code # P0xxx what . There are a number of codes for the O2 sensors on cars . They don't say replace the O2 sensor . diagnostics must be done , electrical circuit testing , plus other tests

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2000 Pontiac sunfire 2.2 got code 1137. How do I fix. Car won't start. I changed o2 sensor.


The 1137 OBD2 code is typically an o2 sensor problem as you have indicated, first I would make sure your replacing the correct o2 sensor as there are two (upstream and downstream), although it is possible that a bad o2 sensor could keep your engines fuel injection system from delivering the fuel to your engine, in my experience having a bad sensor typically results in a check engine light and running with a less than optimum fuel air mixture, it does not typically keep your vehicle from starting. If your still getting the 1137 error code after replace the o2 sensor and checking its connecting wires I would start looking for a bigger issue.

May 16, 2012 | 2000 Pontiac Sunfire

1 Answer

Check engine light is on and it shows code P0032 on 2004 Dodge Grand Caravan 3.8 I think that is something on the O@ sensor, Can anyone point out where and how and if I have more than one O2...


P0032 - Oxygen (A/F) Sensor Heater Control Circuit High (Bank 1 Sensor 1)
A P0032 DTC (diagnostic trouble code) refers to the O2 sensor (oxygen sensor) located on Bank 1 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. The sensor 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 O2 sensor. Essentially this P0032 code means that the resistance of the heater circuit is higher than normal. In some cases, that resistance level must be higher than 10 A to trigger the DTC code.

Note, this code is very similar in nature to P0031, P0051, and P0052

Most likely you'll not notice any symptoms other than the MIL (malfunction indicator lamp, a.k.a. the check engine light) will illuminate.

A P0032 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


I hope this helps, abd just keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment. Have a nice weekend and thanks for using FixYa.

Jose.

Oct 16, 2011 | 2004 Dodge Grand Caravan

2 Answers

2004 Dodge Dakota 4x4 trouble engine light on Code P0157 what is the problem?


Sensor 2 Bank 2 is the left rear oxygen sensor. It problably is bad
and needs to be replaced before your next inspection. The rear oxygen
sensor just monitors what is coming out and isn't as important as the
front oxygen sensor. The car will still run properly if you don't
replace it but will not pass inspection, in most states, if you don't
replace it. The part is inexpensive (about $30) but is hard to
replace without the proper tool. They make a special socket for
replacing oxygen sensors. You should be able to pick up the socket
for $15-$20. It has an opening for the attached wire. You could try
to remove the old one with an open ended wrench but you will probably
strip it. It's a 22 mm or 7/8 inch.

Jul 30, 2011 | Dodge Pickup Cars & Trucks

1 Answer

Getting no spark. a recent code mentioned the crank sensor and o2 sensor. the o2 sensor was replaced and no new code has shown but it only ran once since then. would like to know where the crank sensor...


O2 sensor won't cause a no spark no start condition but the crank sensor will. most time bad crank sensor will not set a code if engine doesn't start. usually set code on o drop while driving. I would check connection at sensor if good then replace sensor.

Jul 13, 2011 | 1998 Saturn SL

1 Answer

What fuse controls the O2 sensor heater? My engine light stays on. I went to autozone and had them run a diagnostic. It coded the fuse for the O2 sensor. I have previously changed the cat conv. and both O2...


There is no fuse for the heater on the o2 sensor if the heater isn't working its usually the o2 sensors bad. (even a new light bulb can come out of the box and not work) but it could be in the wiring.

May 14, 2011 | 2005 Chrysler Town & Country

1 Answer

Symptons o2 sensors


If your O2 sensors are malfunctioning, the main symptom would be that the Check Engine light will come on. On some vehicles, an O2 sensor circuit shorted to ground can cause a no-start problem.
If the "Check Engine" or "Service Engine Soon" light is on and there is a code for the O2 sensors, I would like to also advise you that many O2 sensor codes are not caused by the O2 sensors themselves. In many cases, the O2 sensors are only REPORTING the problem. for example, a code P0171 "Oxygen Sensor Lean" code is rarely ever caused by the O2 sensor. It is usually caused by a vacuum leak or a failed Mass Airflow sensor (MAF) or Manifold Absolute Pressure sensor (MAP) or a bad fuel injector. In these cases, repairing the real reason that the engine is running lean will fix the O2 Sensor code without replacing the O2 sensor.

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2 Answers

Service Engine soon light on - diagnostic code says o2 sensor. What is an O2 sensor and is it hard to replace


You'll need to give us the specific code, in the format P0xxx. Just saying "O2 sensor" doesn't mean anything. It could be the heater circuit, fuse, o2 sensor itself, etc. Changing an O2 sensor isn't too hard but you may not need to replace it/them.

Please report back with the code or look it up at http://www.check-engine-light.com

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2002 chevy trailblazer has rough idle


it could be an o2 sensor. it could also just need a tune up

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