A friend of mine took my FX45 on a trip. While they were away, the battery died. They had the car jump started and took it to an auto parts store that replaced the battery for them. On the way home the SES light came on. They also said that after the battery was replaced, the car died in traffic, but then restarted. Also at a restaurant about 500 miles from here the car cranked, but wouldn't start. After going inside and calling me, they walked back outside and it started normally and they finished the last week of their trip. They drove 800 miles after the battery replacement, they said the gas mileage seemed the same.
When I got the car back, the SES light was still on with codes for P0420, P0430 and P0610 (or maybe P0611). The car has just a hair over 200K on it. It seems unlikely to me that both cats would go bad at the same time. Also, the NATS error seems odd. I looked around for obvious vacuum leaks, etc. I have not looked at the battery closley yet, aside from making sure the terminals were tight - the receipt shows that it is another AGM battery comparable to the one that had been in it for the last 5 years or so.
I tried swapping the MAF with a known good MAF and reset the codes. Within a few miles, the P0420 and P0430 were pending.
Is there any common thing that causes this? I'm not generally one to blame the last guy who worked on it, but I would like to eliminate anything that could be related to the battery swap or from being jumped. The only other things that come to mind are a vacuum leak or something similar that is common to both banks, or maybe a bad ground somewhere.
Watching real-time data as I drove, I didn't see anything out of line. The front 02 sensors are wideband, so I can't directly compare them to the rear.
At idle, the car smells kind of rich. It seems to run perfectly. Pulls strongly to redline in the first few gears. My inclination was that there isn't any sort of blockage on either side.
Coolant temp sensor was reading about 90c, which seemed reasonable. Air temp was reported correctly. short and long term fuel trims seemed to be in range, but that doesn't mean the whole system could be out of whack due to a bad sensor reading.
His only thought was that they drove very easily for a few thousand miles compared to my normal trailer towing and higher speed driving.
Any suggestions? Do I ignore it at 200K? To be honest, one of my few concerns is how close the front cats are to the exhaust ports. I don't know if this is one of those Nissan designs that cat material can get sucked back into the engine if they fail.
Also, the NATS thing seems odd. I don't want to get stranded somewhere.
When I got the car back, the SES light was still on with codes for P0420, P0430 and P0610 (or maybe P0611). The car has just a hair over 200K on it. It seems unlikely to me that both cats would go bad at the same time. Also, the NATS error seems odd. I looked around for obvious vacuum leaks, etc. I have not looked at the battery closley yet, aside from making sure the terminals were tight - the receipt shows that it is another AGM battery comparable to the one that had been in it for the last 5 years or so.
I tried swapping the MAF with a known good MAF and reset the codes. Within a few miles, the P0420 and P0430 were pending.
Is there any common thing that causes this? I'm not generally one to blame the last guy who worked on it, but I would like to eliminate anything that could be related to the battery swap or from being jumped. The only other things that come to mind are a vacuum leak or something similar that is common to both banks, or maybe a bad ground somewhere.
Watching real-time data as I drove, I didn't see anything out of line. The front 02 sensors are wideband, so I can't directly compare them to the rear.
At idle, the car smells kind of rich. It seems to run perfectly. Pulls strongly to redline in the first few gears. My inclination was that there isn't any sort of blockage on either side.
Coolant temp sensor was reading about 90c, which seemed reasonable. Air temp was reported correctly. short and long term fuel trims seemed to be in range, but that doesn't mean the whole system could be out of whack due to a bad sensor reading.
His only thought was that they drove very easily for a few thousand miles compared to my normal trailer towing and higher speed driving.
Any suggestions? Do I ignore it at 200K? To be honest, one of my few concerns is how close the front cats are to the exhaust ports. I don't know if this is one of those Nissan designs that cat material can get sucked back into the engine if they fail.
Also, the NATS thing seems odd. I don't want to get stranded somewhere.
