I've read several older threads on the captioned codes (or similar, anyways), figured I would start a new thread. My truck is tuned, but with emissions equipment in tact, with a SPADE tuner from DuramaxTuner.com. Did that at 60k miles, now at 96,000. Issues started around 92,000 miles.
4 months ago my truck threw the P1478 (Particulate Matter Sensor Temperature Circuit High Voltage) code for the PM sensor. I tried clearing the code, but it would immediately kick back on. So, I ended up swapping out the sensor itself, last one in the exhaust system at the bend of the tailpipe. CEL went away and all was fine for a few thousand miles. About a month ago, CEL came back on with the P24B1 code (Particulate Matter Sensor Circuit High Voltage Circuit/System), which is confusingly similar to P1478. I cleared that code and all codes stayed away for a few hundred miles. Now the CEL light kicks on anywhere between 25 and 500 miles, now intermittently include code P1476 (Particulate Matter Sensor Sensing Element Supply Circuit High) and P2002 (Particulate Trap Efficiency Below Threshold Bank 1). I have not seen it throw P1478 again, though. Truck has not gone into limp mode, seems to be running fine albeit this annoys the S&*% out of me.
I'm thinking the following:
1. replacement PM sensor I bought is faulty - for $150 I may buy another one and see if that fixes it. might as well try, right?
2. https://static.nhtsa.gov/odi/tsbs/2019/MC-10163244-9999.pdf - there's this service bulletin that includes 3 out of the 4 codes I have been throwing. Would need the dealer to do this reprogramming, correct?
3. I saw in an old thread that someone with similar issues had the entire wiring harness for the emissions sensors replaced and that fixed it. I'm assuming the dealer would run me around with all sorts of "fixes" before arriving at the conclusion to do this and wouldn't start here.
I have not yet taken it in simply for the fact that the truck still runs fine. Maybe fuel mileage down a bit, but with the P2002 code now in the mix, sort of conflicted. No warranty and have seen DPF replacement costs ~$3,500.
Thanks!
4 months ago my truck threw the P1478 (Particulate Matter Sensor Temperature Circuit High Voltage) code for the PM sensor. I tried clearing the code, but it would immediately kick back on. So, I ended up swapping out the sensor itself, last one in the exhaust system at the bend of the tailpipe. CEL went away and all was fine for a few thousand miles. About a month ago, CEL came back on with the P24B1 code (Particulate Matter Sensor Circuit High Voltage Circuit/System), which is confusingly similar to P1478. I cleared that code and all codes stayed away for a few hundred miles. Now the CEL light kicks on anywhere between 25 and 500 miles, now intermittently include code P1476 (Particulate Matter Sensor Sensing Element Supply Circuit High) and P2002 (Particulate Trap Efficiency Below Threshold Bank 1). I have not seen it throw P1478 again, though. Truck has not gone into limp mode, seems to be running fine albeit this annoys the S&*% out of me.
I'm thinking the following:
1. replacement PM sensor I bought is faulty - for $150 I may buy another one and see if that fixes it. might as well try, right?
2. https://static.nhtsa.gov/odi/tsbs/2019/MC-10163244-9999.pdf - there's this service bulletin that includes 3 out of the 4 codes I have been throwing. Would need the dealer to do this reprogramming, correct?
3. I saw in an old thread that someone with similar issues had the entire wiring harness for the emissions sensors replaced and that fixed it. I'm assuming the dealer would run me around with all sorts of "fixes" before arriving at the conclusion to do this and wouldn't start here.
I have not yet taken it in simply for the fact that the truck still runs fine. Maybe fuel mileage down a bit, but with the P2002 code now in the mix, sort of conflicted. No warranty and have seen DPF replacement costs ~$3,500.
Thanks!
