Question about Chrysler 300M
You have a rich mixture, O2 sensors ALWAYS fail lean (low, no voltage signal), the normal voltage from an O2 sensor in a system running in closed fuel loop will be varing up and down, lean, rich and so on the PCM uses the O2 output to always trying to maintain a 14.7 to 1 fuel to air ratio. Why did you replace the O2's?
Posted on Aug 29, 2008
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.
Posted on Jan 02, 2017
Tips for a great answer:
Jul 28, 2015 | Cars & Trucks
Feb 20, 2015 | 2010 Buick LaCrosse CXL
Nov 28, 2013 | Jeep Cars & Trucks
Nov 20, 2012 | Cars & Trucks
Aug 17, 2012 | Cars & Trucks
Mar 28, 2012 | 2001 Jeep Grand Cherokee
Jan 28, 2012 | Chevrolet Avalanche Cars & Trucks
Potential causes of an P0156 code
If you have access to a scan tool, check
the signal voltage for the Bank 2,2 oxygen sensor with the engine at normal
operating temperature. Is it stuck low currently? If so, increase RPM for a few
seconds and see if it affects the reading. If it begins working with increased
RPM, check for holes in the exhaust near the o2 sensor that may cause a false
lean. If the exhaust pipe is intact, the sensor is sluggish, replace it.
If the Bank 2,2 o2 sensor voltage reading remains low with increased RPM, unplug it and then observe the reading. It should have increased to about 0.5 volts or thereabouts. If it did, check for water intrusion or other connector problems. If none are found, replace the shorted o2 sensor. If the voltage reading is still stuck low after unplugging the sensor, then suspect a wiring problem. Using a voltmeter, with the o2 sensor unplugged, check for voltage on the signal circuit at the o2 sensor connector(PCM side). It can vary with model, but should be about 0.5 volts and not above 1 volt. If the voltage reading is too high, repair short to voltage on signal circuit. If the signal voltage checks out, suspect the PCM.
Aug 16, 2011 | 2001 Dodge Stratus
Jun 06, 2011 | Lincoln Town Car Cars & Trucks
Jan 27, 2011 | 2005 Toyota Tacoma
145 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: