P0120 code

1998 DODGE DAKOTA
150,000 MILES • 3.9L • 6 CYL • 2WD • AUTOMATIC
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STARLORD1976
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I keep getting a p0120 code. what is this and how to fix it?
Sep 24, 2019 at 10:24 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good afternoon,

Can you verify the code? There is no 120 listed.

Roy
Sep 24, 2019 at 11:10 AM
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STARLORD1976
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P0121.
Sep 24, 2019 at 11:14 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Okay, this is for the TPS sensor voltage too low.

I attached the flow chart for you to follow to determine the failure.

Roy
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Sep 24, 2019 at 12:07 PM
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STARLORD1976
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What does that mean a short in a wire or bad sensor?
Sep 24, 2019 at 12:11 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
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A short is 2 wires touching together that should not be touching.

A bad sensor is one of the sensors not registering correctly due to an internal failure.

Roy
Sep 24, 2019 at 12:14 PM
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STARLORD1976
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What does it mean if TPS voltage is too low then?
Sep 24, 2019 at 12:17 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
The reading is not correct. that's why you need to follow the flow chart.

Roy
Sep 24, 2019 at 12:25 PM
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