Looking for some help with my 2013 Charger, 5.7 and a high voltage issue. I'm not sure how long the issue has been going on but I noticed a high voltage on the display screen (I have the SRT menu mod done thanks to a Tazer) about 2 weeks ago. The a new problem last week when the check engine light came on when leaving work to go home. I got home and pulled the code, it was for the oil pressure sending unit. So no big deal, I read up on the typical causses and decided to replace the sending unit itself with a new one from the dealer. With that problem fixed, I decided to look into the high voltage reading with a meter on the jump terminals in the engine bay and on the battery terminals in the trunk.
It was reading 14.8 volts, so I though okay, it's charging high for a dead battery. So I pulled the negative terminal and measured the battery. 12.1 volts. So I attempt to charge it, with a good external charger, no luck. Since it was only about a year and a half old, I went and swapped it out for a new one. It's an FVP AGM battery, the new one and old one were the same. I put the new battery in but I still was getting 14.75 volts. I thought maybe the battery was slightly low, so I'd give it a day and double check. The next day, it was still the same. So my next thought was the alternator / voltage regulator, but it has been replaced under recall about 5 years ago from the local dealer. I figured it shouldn't be bad, so I pulled it and had it tested. It tested good 4 times in a row. I learned when having it tested that it does not have a voltage regulator and it is controlled by the PCM.
I don't have a way of reading codes other than the standard OBDII on an Innova 3160g scanner. I've order a BlueDriver scanner that will be here tomorrow to read codes from the PCM and BCM to see what it is reading and what, if any codes have been set it in each module.
How likely is it that the PCM voltage regulator is bad? I am not getting a CEL, but I am confident that 14.8 volts is what took out the last battery especially since it is still running at 14.7 to 14.75 volts. A check of the new battery after shutting off the engine, showed 13.0 volts.
Also, any suggestions for a source to purchase a replacement PCM? I have already been in contact with FS1Inc (Flagship 1) about a programmed replacement unit.
It was reading 14.8 volts, so I though okay, it's charging high for a dead battery. So I pulled the negative terminal and measured the battery. 12.1 volts. So I attempt to charge it, with a good external charger, no luck. Since it was only about a year and a half old, I went and swapped it out for a new one. It's an FVP AGM battery, the new one and old one were the same. I put the new battery in but I still was getting 14.75 volts. I thought maybe the battery was slightly low, so I'd give it a day and double check. The next day, it was still the same. So my next thought was the alternator / voltage regulator, but it has been replaced under recall about 5 years ago from the local dealer. I figured it shouldn't be bad, so I pulled it and had it tested. It tested good 4 times in a row. I learned when having it tested that it does not have a voltage regulator and it is controlled by the PCM.
I don't have a way of reading codes other than the standard OBDII on an Innova 3160g scanner. I've order a BlueDriver scanner that will be here tomorrow to read codes from the PCM and BCM to see what it is reading and what, if any codes have been set it in each module.
How likely is it that the PCM voltage regulator is bad? I am not getting a CEL, but I am confident that 14.8 volts is what took out the last battery especially since it is still running at 14.7 to 14.75 volts. A check of the new battery after shutting off the engine, showed 13.0 volts.
Also, any suggestions for a source to purchase a replacement PCM? I have already been in contact with FS1Inc (Flagship 1) about a programmed replacement unit.
