3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Please help. I'm getting a P0138 code on my truck. Its a 5.7 Hemi 4x4. I read what the code means which is O2 Oxygen Sensor Circuit High Voltage Bank 1, Sensor 2. Problem I'm having is that I only have one exhaust pipe. Can anyone tell me how to solve this riddle. I spoke to the dealer and by pulling my VIN it tells them I should have two exhaust pipes. Your help is always appreciated.
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Did you buy the truck used? If so, the previous owner may have modded the exhaust. I would see if the sensor exists; I would imagine that both O2 sensors would be installed to the same pipe if there was only one...
2002 Ram 1500 QC 4x4, 4.7L
A.R.E. Z-series cap, TMR, "Hat" airbox replacement, Raptor Series 5" step bars
"If everyone liked the same things, it would be a very boring world."
High Voltage Means you are Running rich (More gas being delivered than suppose to)Your Post Cat o2 senosor is prolly going out, What year is your tuck? If its past a certain year you have 4 o2 sensors instead of 2.
Rockauto.com has them for half the price of parts stores. Make sure if you do buy a new one that the brands match or you will have more problems.
After you replace the sensor your truck will thank you with some better MPGs
03 Single Cab Hemi 4x4 Debadged Superchips 3815 Straight Pipe Cat Back CAI TB Power Wire 180T-stat Push Button Start TRM Mod Trans Line Booster DIY Fogzilla And Still Building
you should have 1 pipe on each side off the exhaust manifolds. sensor 2 is after the cat. bank 1 I believe is the passanger side. Willdikem66 is correct should be 4 o2 sensors total. It is still single exhaust. Also known as 2 into 1.
12 Ram 2500HD Crew Cab 6.7 Cummins. Sinister diesel egr kit. H&S mini max. Home depot air box modification. Flo-Pro 4" turbo back exhaust. 305/70/17 Nitto Terra Grapplers. 0-2.5 Bilstein shocks. Rough country 2"leveling springs. Frontier grill guard. Truxedo low pro QT tonneau cover.