OBD2 Sensors >> GM 3.1L V6 L82/LG8 Engine Sensor Locations

View with no engine cover installed.  2003 Pontiac Grand Prix 3.1L LG8
  1. Fuel injectors (located on the top of the engine under intake manifold)
  2. Mass airflow sensor (MAF) (attached to air cleaner)
  3. Intake Air Temp Sensor (IAT) (located in tube between air filter housing and engine)
  4. Camshaft position sensor (CMP) (located at the engine timing cover)
  5. Oil pressure sensor (located towards rear of engine on front side of vehicle)
  6. Knock sensor (KS) (located on the front of engine above the oil filter)
  7. Crankshaft position sensor (CKP) (located on the front of engine near crankshaft pulley)
  8. Engine coolant temperature sensor (ECT) (located at the rear of engine on top)
  9. Ignition coils (located on top of engine towards rear of vehicle)
  10. Heated Oxygen Sensors (HO2S) (located in the rear exhaust manifold)
  11. Throttle Body / Idle Air Control (IAC) / Throttle Position Sensor (TPS)
  12. Manifold Absolute Pressure Sensor (MAP) (on top of front of engine attached to intake manifold)

Models Found On

  • 1994–2005 Buick Century
  • 1994–1996 Buick Regal
  • 1994–1998 Buick Skylark
  • 1994–1996 Chevrolet Beretta
  • 1994–1996 Chevrolet Corsica
  • 1995–2001 Chevrolet Lumina
  • 1997–2003 Chevrolet Malibu
  • 1995–1999 Chevrolet Monte Carlo
  • 1994–1998 Oldsmobile Achieva
  • 1997–1999 Oldsmobile Cutlass GLS
  • 1994–1996 Oldsmobile Cutlass Ciera
  • 1993–1997 Oldsmobile Cutlass Supreme
  • 1994–1998 Pontiac Grand Am
  • 1994–2003 Pontiac Grand Prix
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Keith Giuliano
Keith Giuliano
1 year ago

I have a 1996 olds ciera 3.1. After replacing the intake manifold gasket I have a female 3pin connector with 1 red wire and 2 black wires in the harness with the IAC and throttle sensor which I can not find a home for. The plug body is tan with a purple/ blue rubber boot

Ashley Davis
Ashley Davis
1 year ago

Car issues help

BAT Team
1 year ago
Reply to  Ashley Davis

What year make model? What are the issues Ashley?