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95 astro code 21 and 45
95 astro with 190,000 miles runs terrible feels like it is pushing all the time when break is applied. ck'd codes and concluded the code 21 is causing the code 45. haynes manual says to ck out TPS i did and it failed bought new one, no change thought new one was bad swapped it out for a 3rd one same thing manual says .5 vdc output at idle I'm getting 4.8vdc at idle with all 3 TPS sensors also gas milage is between 15 and 16 MPG HELP PLEASE
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