Q: All 4 heated O2 circuit high, and alternator not charging

asked by on

Ive swapped out alternator with a good one from my other stratus and still no charging.all 4 heated o2 circuit high and I've replaced all 4 O2 sensors and replaced PCm. I'm very mechanically inclined and i cant figure this out. Please help!

My car has 132000 miles.
My car has an automatic transmission.

As you may know, the alternator is unrelated to the O2 sensors and these will not impact the charging of the battery. The charging issue may be related to a bad voltage regulator which is a unit that monitors the charging of the battery by the alternator to be sure that it does not over charge or under charge the battery.

When this is not working properly, this can cause an otherwise good alternator to not charge the battery properly. I would recommend having the alternator and voltage regulator tested to determine what may be causing the problem. If you would like consult another expert for a second perspective, a certified technician from YourMechanic can come to your car’s location to help diagnose the charging problem and pinpoint the fix.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. All 4 heated O2 circuit high, and alternator not charging

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Rpm problem

Hi Ritchie. Thanks for contacting us today. The first thing you need to do is isolate the source of the RPM increase. It is possible that a vacuum hose was not correctly attached during the service, so I would recommend...

Q: Hi, im hearing a creaking noise everytime i turn my wheel on my dodge stratus. Sometimes when it rains, the noise goes away but th

Hello, thank you for writing in. The control arms were a good guess, and there are several other tests you can do. You may be dealing with a failing steering or suspension component. You can start by performing a bounce...

Q: Check engine light on flashes five times stays on

Hi there. If the same code is returning, check to see if the new pig tail is installed correctly. If the wires aren't in the right position, you will have the concern you're experiencing as it could be shorting the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...