Agreed.. TVH sensors were are problem also. After spending a lot of time checking everything else, purchase OEM sensor and they work.

Did you try the TVH parts first & they were faulty? Then bought OEM & that solved issue?

Hey I'm new to this site and was wonder if anyone has worked on a crown sp3200 with error code 57 thanks in advance

We just had the same problem. Went with OEM as opposed to TVH and it solved the issue.

All has been checked. Changed out as a pair bought new from tvh. According to my ohms tests the old sensors check out good. Not sure where to go from hear. Did not check the ohms on the tvh new sensors.

That's the gas injection module used to be fitted.Have you plugged in the laptop to check double check the fuses have you checked all the relays.I always change the crank and the can sensors as a pair don't trust Tvh ones have had problems Alan

Well we just spent 4 + hours checking power/continuity paths,connections, & everything checks out. So, I don t have a ignition coil pack trigger pulse @ any of the coil packs. Coil packs are powered up,grounds are good. Pulse wire continuity path from ecm to each coil pack are good. Power,ground & continuity paths from the ecm to & from the cam sensor & crank sensors are good. Original cam & crank sensors ohms check out. My question is (2005 year truck) what is the separate small black box mounted under the battery? A Nissan tech said it is a "spark trigger module" & said they have R/R quite a few on them. The OEM parts manual labels it as a "LPG injector driver". Which is it,a ignition controller, a fuel injector controller, or a combination controller?
The ecm isn t available but there is a updated ecm kit? available for a about $1100. I want to R/R that supposed spark trigger mod. but I didn't see any wires on it that were related to spark. I opened it up & no smell & looked good for what ever thats worth.
I frickin tell you this couldn t of happened @ a worse time.