SalemNews.com, Salem, MA

Business

August 24, 2013

Auto Scanner: Are bad oxygen sensors to blame?

Q: I have a check-engine light that comes on after 50 miles or so and the fault code is 44 — that is bad oxygen sensor. I have changed both sensors, but the check engine light comes on with the same fault code. I have had the dealer look at this problem and no one can find a solution. I hope you can help.

A: I believe that you changed two oxygen sensors and it didn’t resolve the problem. I can’t, however, believe a competent repair shop with access to a good diagnostic chart cannot resolve the problem. Let’s start at the beginning. Code 44 is not a trouble code that says you should change the oxygen sensors. Code 44 means the following: There is a problem in the oxygen sensor circuit on the right side cylinder head. The oxygen sensor receives 12 volts for the heater from the fuel pump relay; this wire may be chafed, or the relay may not be functioning properly. Also, the ground circuit for the oxygen sensor needs to be checked with a digital voltage ohm meter. By any chance do you still have your receipt for the parts you bought to use as diagnostic tools? If so, you may want to return them and reinstall your old sensors. If the sensor has more than 60,000 miles on it, you may have just done some good maintenance by updating the sensors. Make sure the shop you are working with has a good understanding of what a Code 44 actually is.

Q: have an 2007 Ford Explorer, 4.6 V8, 6-speed automatic, with 41,000 miles. Over the past three weeks the car has stalled three times — once while taking a left turn, once while stopped at a light, once while approaching a light at 10 mph. No codes are showing, the dealer has no clue, and I’m fearful of a serious accident. Would greatly appreciate your trusted advice.

Text Only | Photo Reprints
Business

AP Video
All Aboard! LIRR Strike Averted Microsoft to Cut Up to 18,000 Jobs Time Warner Rejects Murdoch's Takeover Bid Yellen Says Economy Still Needs Fed Support Cleveland Expects Economic Boom From Lebron Justice Dept. Fines Citigroup $7 Billion Justice Dept. Fines Citigroup $7 Billion Downside of Low Mortgage Rates? Less Selling Cupcake Shop Crumbs Shuttering All Its Stores San Francisco Prepares for Soda Battle Dow Breaks Record 17,000 GM Crash Compensation Could Top $1 Billion GM Won't Limit Crash Compensation Funds Justices Rule for Broadcasters in Aereo Fight
NDN Video
Obama: Putin must push separatists to aid MH17 probe Michigan inmates no longer allowed to wear orange due to 'OITNB' Adam Levine Ties the Knot Sebastian The Ibis Walks Beautiful Bride Down The Aisle | ACC Must See Moment NASA Ceremony Honors Moon Walker Neil Armstrong Faces of Souls Lost in Malaysian Plane Crash 105-year-old woman throws first pitch Man Creates Spreadsheet of Wife's Reasons for Turning Down Sex 'Weird Al' Is Wowed by Album's Success Rory McIlroy struggles, surges, wins British Open NOW TRENDING: Real life Pac-Man Explosions as hot air balloon crashes in Clinton DUI Driver Dragged to Safety by Officer After Walking Onto Busy Freeway Celebrities That We'd Like to Send to the Moon Spectacular lightning storm hits London Malaysian Flight Victim Was South Florida Grad Rory McIlroy on pace to break British Open records Officials Fear MH17 Site Now Tampered by Rebels Lowes employees repair Vietnam vet's wheelchair Widow of Staten Island man who died after NYPD takedown says he was unjustifiably targeted
Comments Trcker