O2 sensor

Tiny
LISA WARREN
  • MEMBER
  • 2001 DODGE CARAVAN
  • 3.8L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 174,000 MILES
I went to AutoZone they said to get a new O2 sensor bank 1 sensor 1 so I had it put in. Now it says no O2 reading and the engine light came back on. What are things going on?
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Monday, May 15th, 2017 AT 2:55 PM

9 Replies

Tiny
CARADIODOC
  • EXPERT
Why did a parts salesman tell you to buy a new sensor? What problem are you trying to solve? What are the symptoms?
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Monday, May 15th, 2017 AT 3:37 PM
Tiny
LISA WARREN
  • MEMBER
When he hooked the code reader up to desktop computer (at Autozone) that is the part that came up. After clearing the engine light and running van light comes back on. Mechanic just put Dielectric Grease on end. Did not hear back yet if that worked. It has a brand new sensor.
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Tuesday, May 16th, 2017 AT 9:05 AM
Tiny
CARADIODOC
  • EXPERT
The problem here is diagnostic fault codes never say to replace a part or that one is bad. They only indicate the circuit or system that needs further diagnosis, or the unacceptable operating condition. When a part is referenced in a fault code, it is actually the cause of that code about half of the time. Before we waste your money on parts, we have to rule out wiring and connector terminal problems in that circuit.

Some web sites provide suggestions on what it will take to solve a fault code based on previous experience, but there is no way to know which of the half dozen solutions will be the right one. What has happened is you were sold the part most likely to solve the problem, but the circuit should have diagnosed first.

You also never listed the exact fault code number. There are well over two dozen codes related to oxygen sensors, and they mean very different things and require different diagnostic steps. The place to start is by knowing the fault code number, then we can determine how to diagnose the cause.
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Tuesday, May 16th, 2017 AT 4:38 PM
Tiny
LISA WARREN
  • MEMBER
What happens to a vehicle sitting a garage for 2 years do all the sensors go bad? Now the map sensor replacement
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Wednesday, May 17th, 2017 AT 7:16 AM
Tiny
LISA WARREN
  • MEMBER
I'll see if I can get the paper with the codes on it so you can get an idea what's going on
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Wednesday, May 17th, 2017 AT 7:17 AM
Tiny
CARADIODOC
  • EXPERT
Sitting doesn't hurt any sensors. If it did, I'd be in trouble. I have a '93 Dodge Dynasty with 4,950 miles. It regularly sits for two or three years without being touched. The last time I drove it, the gas was over five years old, but it ran just fine.

Due to the age of your van, you can read the fault codes in the Engine Computer yourself. Chrysler made doing that yourself much easier than any other manufacturer. Cycle the ignition switch from "off" to "run" three times within five seconds without cranking the engine. Leave it in "run", then watch the codes appear in the odometer display.
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Thursday, May 18th, 2017 AT 12:33 AM
Tiny
LISA WARREN
  • MEMBER
I cannot get the heater sensor to clear everything else gets a green check mark But the heater sensor what do I do and where is it located
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Monday, June 12th, 2017 AT 7:31 PM
Tiny
LISA WARREN
  • MEMBER
Can people text me answers to my question, im not getting notifications when I get answers on here. 716-367-0018
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Monday, June 12th, 2017 AT 7:36 PM
Tiny
CARADIODOC
  • EXPERT
I'm not sure what heater sensor you're referring to, or green check marks. I use a Chrysler DRB3 scanner for all of my vehicles. I have four Grand Caravans, but none as new as yours.

Don't know what to tell you related to e-mail notifications. I haven't heard of anyone having a problem. I'm not advanced enough to do texting, and I don't think my phone has that capability.
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Monday, June 12th, 2017 AT 8:10 PM

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