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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   mdma pills for sale : WhatsApp +33758633852 ketamine, 4-MMC, MDPV, methylone, amphet...   Buy Nembutal Oral Solution Pentobarbital.. WhatsApp +33758633852 order nembutal online in Germany (WhatsA...   Drive Shaft Repair I have a 2015 Chevy Traverse AWD. The fr...   2006 Toyoto Camry XLE Driver Side Electric Window Trouble Hello, Looking for a little brain help ...   Tierod end change caused some kind of leak Hello so I just took my car to the nearb...   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...

Search Auto Parts Search O2 sensors very low readings Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting cipi64 New User Jul 11, 2012, 10:47 AM Post #1 of 4 (1687 views) O2 sensors very low readings Sign In 2002 Mazda MPV ES, 3L, 95K Engine idles rough, but no significant loss of power during driving (though there is some hesitation accelerating). All 4 HO2 sensors read very low voltages, never more than 0.2V and pretty steady (no oscillation). There are two banks (one for each side of the V6 motor), one upstream of cat and the other one downstream. There is noticeable exhaust odor near the front of the car, one mechanic sugested that the front exhaust manifold leaks another pointed at two flexible pipes (under the car). Before i put a couple of thousands in exhaust parts i am trying to understand how is it that these readings can be so low on both banks. Thanks for your feedback. O2 voltage chart: http://cdn.2carpros.com/...large.jpg?1342029044 (This post was edited by cipi64 on Jul 11, 2012, 11:41 AM) Hammer Time Ultimate Carjunky / Moderator Jul 11, 2012, 3:05 PM Post #2 of 4 (1639 views) Re: O2 sensors very low readings Sign In What codes is it setting? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. cipi64 New User Jul 11, 2012, 3:52 PM Post #3 of 4 (1629 views) Re: O2 sensors very low readings Sign In I originally had P0134, P0131 and P0151. I noticed on page 01-02A-68 of the workshop manual that P0131 and P0151 ought to be ignored until P0134 is fixed. Because i disconected the battery as part of other troubleshooting steps all these codes got erased and i haven't seen them back yet. thanks for looking Hammer Time Ultimate Carjunky / Moderator Jul 11, 2012, 4:20 PM Post #4 of 4 (1623 views) Re: O2 sensors very low readings Sign In Those are all lean codes which agrees with your findings. The first thing I would look for are vacuum leaks or air leaks in the intake snorkel. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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