Question about 2002 Chrysler PT Cruiser
The front oxygen sensor was replaced a couple weeks ago. Checked all fluids and the car is running great. I found a list of the codes but don't understand the code description. Can you tell me what these error codes are, one is to inform that the battery had been disconnected within the last 50 starts but I don't understand the other two. Thank you!
Not all replacement O2 sensors are factory direct plug-in replacements. The rewiring job to fit a universal part to your original harness could be suspect even if the new sensor is fine. I don't see anything to worry about at this point. The codes all seem to be related directly to the repair (inoperable O2 sensor, battery disconnected, bad key). They should go away by themselves over time, but you can hasten the troubleshooting process by erasing the codes from memory. All that takes is a couple of seconds and it can be done with most code scanners. If the codes return afterwards, then you will need to consult with your mechanic.
Posted on Dec 07, 2014
I found the codes & basic (VERY basic) descriptions from these sources:
Code P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) - something to do with the O2 sensor circuit, but beyond that I'm not sure.
Code P1685 Skim Invalid Key - Security system issue. I got this answer from the Dodge Forum:
"The Sentry Key Immobilizer Module (SKIM) is part of the security system and kills the vehicle when a wrong key is used. There may be a problem with your key or the chip reader in the ignition switch. This is something the dealer will need to determine for sure. This code will also be set if someone actually tried to steal the vehicle."
Hope this helps.
Posted on Dec 07, 2014
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Posted on Jan 02, 2017
SOURCE: Engine code P1684
P1684 is not a factory diagnostic code, rather a code to identify last disconnect. Factory computers can identify start counts but OTC scanners cannot. The code prevents someone from disconnecting the battery (which clears many codes) and then reconnecting and having it tested. There is no way I can think of to selectively write more starts than the computer sees into the PCM so as to correct this. I can only think that after about 50 trips, it should be good. BTW, this code would have nothing to do with the emissions on the vehicle. I would suggest driving a few weeks so the computer will (hopefully) recognize the failure again and set more faults. The codes generated by these faults will assist in correcting what is actually wrong with the vehicle.
Posted on Jun 20, 2008
I disconnected the batterie for 5 min to clear computer..
Light has gone out ?
If light comes back on I presume I have a slight leak in one of the pressure hoses..I will go through all suggestions cant afford big bills from Chrysler???want to fix this myself
Two yers ago this light came on and I took it to Chrysler they did a Carbon clean-up $400 later it has been fine since but dont think it needs this again I use "Plus" gas and only drive local ...
So wish me luck ...Mike
Posted on Sep 28, 2008
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