Question about 2004 Pontiac Grand Am

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Cannot find the data link connector in my 2004 grand am

My service engine soon light is on steady and I picked up an OBD II reader. I cannot find the data link connector. I looked under the steering wheel and cannot see anything. Does anyone know where it is?

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It should be at the bottom right corner of the underside of the dash (drivers side of course) almost below the steering wheel. If it isn't here, it has been moved, but keep looking because they are never any further away from the steering wheel than 4 feet (legal limit for most stated)

Posted on Nov 20, 2008


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How to change a throttle position sensor on a 94 ford f150 5.0 4x4

How to Replace a Throttle Position Sensor
(DIY & Save up to $135.75 ) - Time: 2.1 hours

1. Throttle Position Sensor - $ 55.44

1. Scan Tool
2. Screwdriver
3. Multimeter

1. Locate the OBD data link connector (DLC). Refer to your owner’s manual for the specific location.
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2. Turn your key to the“ON” position. Do not start the engine.

3. Plug your scan tool into the OBD data link connector. Turn on the scan tool and select the appropriate steps to read the diagnostic trouble code (DTC).


Scanner plugged into OBD-II data link connector.
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  • 5. Disconnect the electrical connector from the throttle position sensor.

  • Electrical connector removed
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  • 7. Remove the throttle position sensor.

  • d3a8007.jpg

    Removing sensor mounting screws

    8. Install the new throttle position sensor. Tighten the mounting screws and attach the electrical connector.
  • 9. Erase the diagnostic trouble code (DTC) with the scan tool using the“delete” or“erase” command. Road test your vehicle to see if the check engine light returns.

    Check engine light

  • Tip: If the check engine light returns, repeat the diagnostic process for additional DTCs or take your vehicle to a certified repair shop.
Direct OE replacement

Hope helped with this. Good luck (remember rated this help).

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OBD 1.5 OBD 1.5 refers to a partial implementation of OBD-II which General Motors used on some vehicles in 1994 and 1995 (GM did not use the term OBD 1.5 in the documentation for these vehicles - they simply have an OBD and an OBD-II section in the service manual.)
For example, the 94-95 Corvettes have one post-catalyst oxygen sensor (although they have two catalytic converters), and have a subset of the OBD-II codes implemented. For a 1994 Corvette the implemented OBD-II codes are P0116-P0118, P0131-P0135, P0151-P0155, P0158, P0160-P0161, P0171-P0175, P0420, P1114-P1115, P1133, P1153 and P1158.[1]
This hybrid system was present on the GM H-body cars in 94-95, W-body cars (Buick Regal, Chevrolet Lumina ('95 only), Chevrolet Monte Carlo ('95 only), Pontiac Grand Prix, Oldsmobile Cutlass Supreme) in 94-95, L-body (Chevrolet Beretta/Corsica) in 94-95, Y-body (Chevrolet Corvette) in 94-95, on the F-body (Chevrolet Camaro and Pontiac Firebird) in 95 and on the J-Body (Chevrolet Cavalier and Pontiac Sunfire) and N-Body (Buick Skylark, Oldsmobile Achieva, Pontiac Grand Am) in 95.
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180px-obd-connector-pinout.png magnify-clip.pngFemale OBD connector pinout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 For ALDL connections, pin 9 is the data stream, pins 4 and 5 are ground and pin 16 is battery voltage.
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An OBD1.5 has been used in some 1995 Volkswagen VR6's (Juice Box's GTI)

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