| 2 to 1 false neutral | 1st Gear and the 2→1 False Neutral |
| Accelerator pedal stuck reading | Throttle Rises on Its Own at Idle (Gen II Drive-by-Wire) |
| Actuator rod | Actuator Rod Length and Cylinder Alignment |
| Air in cooling system | Pin hole leaks |
| Air leak | Finding an air leak |
| Appears to use little fuel | Fuel Flapper Stuck (6-Gallon Tank Cars) |
| Asymmetric shifts | Asymmetric Shifts: One Direction Weaker · Shifter Cylinder Alignment |
| Bench test | Manual Pneumatic Shift Test |
| Bisect fault | Manual Pneumatic Shift Test |
| Blaming the car | Check Driver |
| Blip cylinder | Blip Cylinder Air Supply (Gen1 cable throttle) |
| Bogged corner exit | 1st Gear and the 2→1 False Neutral |
| Brake bias | Changing brake bias with a 3/4” front master cylinder |
| Brake light failure | Brake-light pressure sensor |
| Brake lights not working | Brake-light pressure sensor |
| Cable throttle | Blip Cylinder Air Supply (Gen1 cable throttle) |
| Can’t find neutral | Can’t Find Neutral with the Engine Running |
| Case saver | Front sprocket cover and the case saver |
| Check clutch switch | Clutch Switch |
| Check oil fill | Oil System Health (RPM-Based) |
| Check oil pump | Oil System Health (RPM-Based) |
| Clutch bypass | Gen1 (drive-by-cable / KLine) · Gen2 (drive-by-wire) |
| Clutch switch | Clutch Switch (Gen2 DBW) |
| Compressor running constantly | Compressor Issues · Watching the compressor and tank pressure |
| Compressor short cycling | Compressor Issues · Watching the compressor and tank pressure |
| Compressor won’t run | Compressor Issues |
| Cylinder alignment | Actuator Rod Length and Cylinder Alignment |
| Cylinder misaligned | Shifter Cylinder Alignment |
| Dead paddles | Nothing Works: No Shifts, No Compressor |
| Dropped shift | Missed or Incomplete Shifts (Both Directions) |
| Drying the car | After the session |
| Duct broke at fender | NACA duct cracked at the fender |
| Erratic shifts | GCU Water Intrusion |
| False neutral | Capturing a log |
| Front sprocket nut access | Front sprocket cover and the case saver |
| Fuel flapper | Fuel Flapper Stuck (6-Gallon Tank Cars) |
| GCU dead | Nothing Works: No Shifts, No Compressor |
| GCU log pull | Capturing a log |
| GCU reboot | Crash and reboot triage |
| GCU resets mid shift | Crash and reboot triage |
| GCU water | GCU Water Intrusion |
| Gearshift sensor mimic | Gearshift Sensor Mimic (Gen2 DBW) |
| Gen1 | Blip Cylinder Air Supply (Gen1 cable throttle) · Gen1 (drive-by-cable / KLine) |
| Gen2 | Clutch Switch (Gen2 DBW) · Gearshift Sensor Mimic (Gen2 DBW) · Gen2 (drive-by-wire) · Speed Emulator (Gen2 DBW) |
| Gss mimic | Gearshift Sensor Mimic (Gen2 DBW) |
| Head restraint position | Head Restraints |
| Head restraint set screw | Head Restraints |
| High idle in neutral | Throttle Rises on Its Own at Idle (Gen II Drive-by-Wire) |
| High oil pressure | Oil Pressure |
| High water temp | Water Temperature |
| Hiss after shift | Asymmetric Shifts: One Direction Weaker |
| Hissing tank | Finding an air leak |
| Intermittent shifts | Missed or Incomplete Shifts (Both Directions) |
| Late for tech | Tech inspection |
| Limp mode | Clutch Switch (Gen2 DBW) · Speed Emulator (Gen2 DBW) |
| Loose set screw in cockpit | Head Restraints |
| Low OilP ratio | Oil System Health (RPM-Based) |
| Low hot oil pressure | Low oil pressure once the engine is hot |
| Low oil pressure | Oil Pressure |
| Manual shift | Manual Pneumatic Shift Test |
| Master cylinder adjustment | Changing brake bias with a 3/4” front master cylinder |
| Mechanical binding | Shift Arm |
| Mirrors fold in at speed | Stock mirrors that fold in or vibrate |
| Mirrors vibrate | Stock mirrors that fold in or vibrate |
| Mirrors won’t stay put | Stock mirrors that fold in or vibrate |
| Missed shifts | Capturing a log · Missed or Incomplete Shifts (Both Directions) |
| Missed tech inspection | Tech inspection |
| Muffled shift | Asymmetric Shifts: One Direction Weaker |
| NACA duct cracked | NACA duct cracked at the fender |
| Neutral but no crank | Car Won’t Start — Dash Shows N but Engine Won’t Crank |
| Neutral with engine on | Can’t Find Neutral with the Engine Running |
| No blip | Blip Cylinder Air Supply (Gen1 cable throttle) · Clutch Switch (Gen2 DBW) · Gearshift Sensor Mimic (Gen2 DBW) |
| No compressor | Nothing Works: No Shifts, No Compressor |
| No crank | Car Won’t Start — Dash Shows N but Engine Won’t Crank |
| No cut | Gearshift Sensor Mimic (Gen2 DBW) |
| No shifts | Nothing Works: No Shifts, No Compressor |
| Not fast enough | Check Driver |
| Not responsive to throttle | Fuel Flapper Stuck (6-Gallon Tank Cars) |
| Oil pressure drops when hot | Low oil pressure once the engine is hot |
| OilP sender failed | Oil System Health (RPM-Based) |
| One direction dead | One Paddle Direction Doesn’t Respond |
| Out of fuel | Fuel Flapper Stuck (6-Gallon Tank Cars) |
| Overheating | Water Temperature |
| Overheating after topping up | Pin hole leaks |
| Paddle dead | One Paddle Direction Doesn’t Respond |
| Play in steering | Steering slop |
| Pneumatic test | Manual Pneumatic Shift Test |
| Pucks destroyed | Splitter wear pucks |
| Radiator pin hole leak | Pin hole leaks |
| Rain preparation | Before you go out |
| Rev limited in neutral | 1st Gear and the 2→1 False Neutral |
| Revs climb at idle | Throttle Rises on Its Own at Idle (Gen II Drive-by-Wire) |
| Running in the wet | Before you go out |
| Shift arm | Shift Arm |
| Shock pressure drops between weekends | Shocks that bleed down between weekends |
| Shocks bleeding down | Shocks that bleed down between weekends |
| Shocks losing pressure | Shocks that bleed down between weekends |
| Slow lap times | Check Driver |
| Slow pressure loss | Finding an air leak |
| Soft brake pedal after master swap | Changing brake bias with a 3/4” front master cylinder |
| Speed emulator | Speed Emulator (Gen2 DBW) |
| Splitter wear pucks | Splitter wear pucks |
| Splitter wearing through | Splitter wear pucks |
| Sprocket cover blocks access | Front sprocket cover and the case saver |
| Start in gear | Gen1 (drive-by-cable / KLine) · Gen2 (drive-by-wire) |
| Steering slop | Steering slop |
| Stuck clutch switch | Clutch Switch |
| Stuck in neutral on downshift | 1st Gear and the 2→1 False Neutral |
| TPS | Throttle Rises on Its Own at Idle (Gen II Drive-by-Wire) |
| TPS connector pins | Throttle Rises on Its Own at Idle (Gen II Drive-by-Wire) |
| Tech window closed | Tech inspection |
| Thin oil pressure | Low oil pressure once the engine is hot |
| Throttle capped | Speed Emulator (Gen2 DBW) |
| Throttle position sensor | Throttle Rises on Its Own at Idle (Gen II Drive-by-Wire) |
| Throttle rises on its own | Throttle Rises on Its Own at Idle (Gen II Drive-by-Wire) |
| Unwanted acceleration | Throttle Rises on Its Own at Idle (Gen II Drive-by-Wire) |
| Vague steering | Steering slop |
| Very high oil pressure | Oil Pressure |
| Very high water temp | Water Temperature |
| Water in cockpit | After the session |
| Water intrusion | GCU Water Intrusion |
| Weak downshift | Asymmetric Shifts: One Direction Weaker · Shifter Cylinder Alignment |
| Weak upshift | Asymmetric Shifts: One Direction Weaker · Shifter Cylinder Alignment |
| Wet cockpit | After the session |
| Will only idle | Throttle Rises on Its Own at Idle (Gen II Drive-by-Wire) |
| Won’t start | Car Won’t Start — Dash Shows N but Engine Won’t Crank |
