Top - Volvo Brick Diagrar

| System (Socket) | Flash Code | Meaning | | :--- | :--- | :--- | | Pin 1 (Fuel) | 1-1-1 | No faults (Perfect!) | | Pin 1 (Fuel) | 1-2-1 | Mass Air Flow (MAF) sensor signal missing | | Pin 1 (Fuel) | 2-3-2 | Oxygen sensor (Lambda) aging or faulty | | Pin 2 (Ignition) | 1-1-1 | No faults | | Pin 2 (Ignition) | 2-3-1 | Crankshaft position sensor signal intermittent | | Pin 5 (ABS) | 1-1-1 | No faults | | Pin 5 (ABS) | 4-1-3 | Right rear wheel speed sensor open circuit |

After fixing the issue, clear the codes: volvo brick diagrar top

For early 240s: Ground pin 2 (or 6) for 20+ seconds, or disconnect battery for 10 minutes. | System (Socket) | Flash Code | Meaning

Assuming a hypothetical Volvo 240 series as our model: For early 240s: Ground pin 2 (or 6)