2014 Ram 1500 EcoDiesel P26AB Coolant Bypass Stuck

Not much to write about this one. I got a new code today – P26AB. My reader simply says read the manual, which doesnt tell me anything. P26AB, however leads to the Engine coolant by pass valve being stuck.

Its about a 25/30 minute job to do. I really should get better at grabbing pictures, but the job was so straight-forward you’ll know exactly what was going on.

From what I’ve read, its the same code/part location for the ED as well as the V8. the V6, idk.

What you’ll need –

• channel-locks/pliers
• flat-head screwdriver
• hose clamp/pinch tool

1. Prep to have easy access –
   • unscrew the hose clamp on the airbox side of the MAF/intake line
   • remove top of intake airbox
   • remove the bottom of the airbox – no screws, just rubber grommet. You can get the whole thing out in one pull, even with the horn being all weird
   • You should now have complete and easy access to the valve.
   • (you can also unscrew and move out of the way, the intercooler/cold line to get it out of the way)
2. unplug the harness to the valve
3. pro tip – use hose clamp tools to pinch the lines closed to keep from belching too much coolant
4. using pliers (or small socket trick), unhook the valve from the mount plate – plastic clips
5. using pliers, slide the hose clamps for the hoses up the line and out of the way
6. reverse steps plugging back in everything with the replaced part