Question about 1998 Chrysler Town & Country

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Battery Light Apparent intermittent charging failure, (14.24V to 12.02V at idle, all extra loads off,) with OBD2 Codes P0040, P0041.

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Po040 and 041 are oxygen sensor codes for reversed connections . intermittent charging open circuit in alternator brushes .

Posted on Mar 21, 2014


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Replaced sensors still in limp mode and runs low idle now checked codes again now there is non

Disconnect the battery negative for 5 min's and then run the car until the check engine light comes on again, then recheck the codes, remember if this is a transmission related failure you need a special scanner to read those codes, an OBD2 code reader will not read them.

Jan 25, 2017 | Cars & Trucks

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How do I do a computer reset for a 2005 Forester

you only do a computer reset when the check engine light is on

if you have an obd2 scanner at your disposal, you can reset the computer that way AKA clearing any stored trouble codes in the computer

Mar 21, 2015 | 2005 Subaru Forester

1 Answer

Intermittent charging

Generally that indication implies generator failure. Generator failure can come in multiple forms. A faulty ground will cause the generator not to charge and potentially burn it up. A severed phase wind (remember, your alternator is really a three-phase generator with a six pulse front end rectifier set) will cause the light to intermittently come on along with weak charging output. A voltage regulator failure will cause zero field current in the rotor. A brush failure will also cause a generator failure light to come on and stay on. A rectifier failure (any of the six) will cause the generator not to charge properly and turn on the MIL and generator failure indicator (looks like a battery). The condition of the battery can also cause generator failure, if the battery is defective (buckled plates, weak electrolyte, low water, etc.) it will place a very high load on the generator continuously, causing it to 'full field' the rotor which can cause the rotor to overheat and fail. Never run a generator without the battery terminals connected as this will cause it to fail quite spectacularly. Do not attempt to verify output of the generator with the battery terminal leads disconnected.

If generator failure is indeed the cause, find out why. Generators rarely fail. When they do, it usually is caused by poor ground connections, corroded battery terminals, high continuous loads, electrical faults and poorly-wired ancillary equipment, such as head units, amplifiers, inverters, etc. Always check all these out when replacing the generator. Never run a generator without the battery terminals connected as this will cause it to fail quite spectacularly.

Jul 15, 2014 | 2010 Volvo S80 2.5

1 Answer

Code 41

code p0040 refers to oxygen sensor signals swapped , bank 1 sensor 1 / bank 2 oxygen sensor 1===causes --wiring problems . Check that the wiring connections on the ECM or swapped on the sensors or wrong sensors in the system. One will be HO2S and the other is a O2S

Mar 21, 2014 | 1998 Chrysler Town & Country

1 Answer

Alternator tests good wont charge battery

I'm sorry to say it could be the computer.
The computer controls idle speed as well as alternator output.
If the check engine light is on you should get it scanned for trouble codes.

Dec 18, 2012 | 1998 Dodge Stratus

1 Answer

Idle fluctuates on 1995 f250, sometimes dies, sometimes revs, no apparent vaccum issues, IAC with scan tool reads low voltage issue. Could this be vaccum, charging system, faulty computer? Problem is...

Engine stalls cold or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.

Nov 08, 2012 | 1995 Ford F250

1 Answer

2006 Ford fusion Airbag light came on driving down the highway. Called dealer and they said to replace battry. Replaced battery. Wrench light came on,check engine light came on and the airbag light came...

I would find it hard to believe a dealer would give
out ANY info.
They want all the business and nothing going to
any local repair shops
I NEVER recommend going to any dealer,you
can if you want to spend some extra money for
no apparent reason

You have an OBD2 System Malfunction
Specifically theSRS System (airbag,etc)
You may also have a second system problem

There is no quessing to be done here and no
one can give answers
Your vehicle,as with ANY dash light that comes on
has to be diagnosed for codes,a problem found
a solution come up with and the issues repaired.

Mar 02, 2011 | 2006 Ford Fusion

1 Answer

On my 1998 crysler sebring I am getting OBD II codes of 40 and 41,Transmission & engine module,any suggestions where to start? Thanks.

code 40-
Possible causes - 1/1 And 2/1 O2 sensors harness circuit shorted
- 1/1 And 2/1 O2 sensors harness circuit connectors (wrong connection)
- Faulty Powertrain Control Module (PCM) P0040 CHRYSLER Description At ignition on the Powertrain Control Module (PCM) checks the voltage on the ground side of the O2 sensor harness connector. If voltage is higher than two volts the P0040 code will set. code 41- Possible causes - 1/2 And 2/2 O2 sensors harness circuit shorted
- 1/2 And 2/2 O2 sensors harness circuit connectors (wrong connection)
- Faulty Powertrain Control Module (PCM) P0041 CHRYSLER Description At ignition on the Powertrain Control Module (PCM) checks the voltage on the ground side of the O2 sensor harness connector. If voltage is higher than two volts the P0041 code will set.

Dec 01, 2010 | 1998 Chrysler Sebring

1 Answer

99 cabrio starts ok but dies when idling at stop light, hesitates under load sometimes also. intermittant idle fluxuation.

My first guess would be a bad idle air control valve if an inspection shows nothing apparent.

Dec 29, 2009 | 1999 Volkswagen Cabrio

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