Walkthroughs: throttle, mixture by bank, tank sender

Another 28 codes stopped being dead ends. Code pages with nowhere to go after the description: 75 left out of 298.

Three new walkthroughs — again not «about everything» but aimed at specific clusters of codes that are resolved by one conversation.

Electronic throttle and pedal — 10 codes. Why the car goes into protection and refuses to pass two thousand rpm, and how to check the pedal in two minutes using the «throttle position» reading.

Lean and rich mixture — 12 codes. These codes do not merely say «the mixture is wrong» but state the operating mode and the bank. Lean only at idle means an air leak; lean only off idle means delivery. That is the split people usually pay a workshop for.

The fuel gauge lies — 6 codes. Including the unpleasant consequence: while the tank level is unknown, the vapour system self-test never runs, and the car is failed at the emissions test with clean exhaust.

All 28 codes now lead from their own pages to a walkthrough, and the walkthroughs are linked to the readings, symptoms and lamps they discuss.