Owner's book · not a shop

Know the car. Then the window. Factory specs in plain English — don't authorize until you can say this at the counter.

Owner tools

Lab desks

No dongle required

Type the code

Any $20 scanner. Five characters. We write what it means and what to ask before parts. iPhone Safari has no Web Bluetooth — type the code.

Park first · Mode 03

ELM327

Checking whether this browser can open Web Bluetooth.

C0035

soon · typical $80–$320

ABS / traction lost the left-front tone. A sensor, a damaged tone ring, or debris. The car still brakes — ABS may not.

Usual first look · WSS, tone ring, harness

Ask which corner and whether the ring is cracked. A full ABS module is rare on this code.

Say this
I have C0035 stored. I want that corner's wheel-speed sensor and tone ring — not an ABS module.

Safe to look at in the driveway (cap, boot, connector)

SAE layout: chassis (ABS / brakes / suspension). Subsystem looks like ABS, brake, or suspension circuit. Generic (SAE) code.

This is an SAE-generic layout. The number is real even if our dictionary has no paragraph yet.

Paste the RO. Circle the line they hung on this pointer. The code is not a parts list.