Question about 2001 Ford Escort ZX2

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Emmishons had test on 1999 for focus and the co was high o2 was high and the lamber was high any advice and the fault codes are p011 p012 p010

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Manifold temperature sensor faulty, availble at autozone.

PN: SU2004 $14.99

Posted on Nov 21, 2008

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Posted on Jan 02, 2017

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Front o2 sensor Peugeot RCZ 156thp 2010


best advice is to have the fault codes read first
that will show a HO2S or O2 sensor fault

Jun 15, 2017 | Peugeot Cars & Trucks

1 Answer

What causes a rough idle on a 2003 Nissan Sentra Spec-V? Car otherwise runs fine while driving.


The rough idle is associated with the p011 code. The P011 code is: Camshaft A over advanced. There is a mechanical fault with the intake camshaft.
You need to take the car into a mechanic, preferably the dealer since they have all of the needed special tools, to properly diagnose and repair the issue.

Jul 25, 2014 | 2003 Nissan Sentra

1 Answer

What is the codepo135


PO135 is an (O2) Oxygen Sensor Fault (http://www.obd-codes.com/p0135)

PO153 is an (O2) Oxygen Sensor Fault (http://www.obd-codes.com/p0153)

PO174 is "Too Much (O2) Oxygen in Exhaust" (http://www.obd-codes.com/p0174)

PO300 is "Random / Multiple Misfire" (http://www.obd-codes.com/p0300)

It would seem these are all related to one or more spark plugs NOT firing. Since it isn't firing, Oxygen (O2) is being detected in the exhaust - when Carbon Monoxide (CO) is expected. Other sources of high O2 can be cracked manifold, exhaust pipes, etc. Good luck!

May 21, 2014 | 1997 Cadillac Seville

2 Answers

After testing the MAF sensor, changing the PCV & CO sensors, I still get the check engine light, 1999 ford explorer sport 4.0 SOHC 6 cyl I've read to check the intake manifold and then go fu


What is a CO sensor? Never heard of it. a 1999 OBD2 ford has approximately 1600 possible fault codes most of which can turn on the light. If you dont know which one is turning it on, you are guessing randomly which is expensive and usually unsuccessful. get the code(s) and then diagnose the possible causes. The vehicle you list (99 4L explorer) rarely had injector problems. Much more common were EGR sensor(DPFE) sticking at voltage, evap problems, misfires, and lean conditions due to dirty MAF, or vacuum leaks. get the fault code, or you will not fix the problem.

Dec 29, 2012 | 2007 Toyota Land Cruiser

2 Answers

The co level is to high, the car has been standing for 9 months


High CO results from a vehicle running 'naturally' rich - ie a rich condition that is not being forced from the computer.

The basic, most probable causes of a high CO count could be one of the following;

High fuel pressure (constricted filter, pinched line, etc)
Ruptured pressure regulator diaphragm
Malfunctioning Evaporative Emissions System
Crankcase fuel contamination (head gaskets, injector/regulator leak)
Closed loop incorrectly shifted to rich (o2 sensor, map/maf sensor, coolant temp sensor, Throttle position sensor, etc, etc)

Tell me...What is the NoX Reading?

Nov 30, 2009 | 1999 Subaru Impreza

2 Answers

Ford failed MOT on High CO emission


High CO usualy means the O2 sensors are not reading properly. Take it to a parts store that can read codes, I know Auto Zone does in my area. If it is the O2 sensor it is an easy fix but the sensors run about $50.00 each.

Apr 18, 2009 | 1995 Ford Escort

2 Answers

1991 chevrolet silverado truck engine hesitates, fuel injected. Gives me codes #42 and #44


Trouble Code 44 indicates that the O2 sensor is showing a persistently high exhaust oxygen content (lean), despite the efforts of the ECM to increase ...
Code 42 : Electronic spark timing (EST) circuit fault

Feb 17, 2009 | 1999 Chevrolet Silverado 1500

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