Volvo Brick | Diagrar Top

Do not hunt for a paper diagram. Look at the underside of your hood . Volvo usually placed a vacuum diagram sticker there. If it is missing, search Google Images for "Volvo 240 Vacuum Diagram [Your Year]" .

| Code | Meaning | Most likely fix | |------|---------|----------------| | 1-1-1 | No faults | Rejoice, then look for intermittent issues | | 1-2-1 | Mass Air Flow (MAF) signal absent | Clean MAF with MAF cleaner; replace if dead (Bosch 0 280 212 016) | | 1-3-1 | Engine RPM signal missing | Check crankshaft position sensor (CPS) – common failure on Bricks | | 2-1-2 | O2 sensor faulty or no signal | Replace oxygen sensor (pre-cat) – use NTK or Denso only | | 2-3-1 | Lambda control lean/rich | Check for vacuum leaks (hoses, intake manifold gasket) | | 3-1-1 | Vehicle speed sensor (VSS) absent | Cluster’s rear sensor or wiring – affects idle when coasting | | 4-1-1 | Throttle position sensor (TPS) bad | Adjust or replace TPS (must click at idle) | volvo brick diagrar top

: Detailed views of the SOHC (Single Overhead Cam) or the rarer DOHC 16-valve variants (B234F) show the arrangement of valves and the distributor location, which on 740/940 models is often mounted at the back of the head near the firewall. Troubleshooting the "Top" Do not hunt for a paper diagram