Transmission and lost-communication codes: walkthroughs

The two largest blank spots in the reference are closed: 46 codes that had neither an article nor a guide now lead to a walkthrough.

The reference holds 298 codes. For 169 of them the page used to end in nothing: a description, a «where to start» note — and no way forward.

We counted those pages and took on the largest clusters.

Transmission — 17 codes. From P0700, which means nothing on its own, to solenoids and torque converter lock-up. The walkthrough is here.

Lost communication — 20 codes. Every U code: who exactly went quiet, why it is usually the power supply rather than electronics, and what to check first. The walkthrough is here.

We also fixed the linking: the particulate filter article had been written without code tags, so pages P2002, P2453 and P2458 had no link to it at all. The article existed; it could not be reached from the code page. That is nine more codes.

Codes with no way forward at all: 123 instead of 169. The work continues.