P1120 Diagnostic Trouble Code Discussion for May 2026
TP Sensor 1 Circuit Malfunction
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| Help Request | Posted | |
| 1998 Chevrolet Corvette 5.7L No Start, Broken gears in T/B P1120: TP Sensor 1 Circuit Malfunction. What a mess! I'm retired but am helping a guy out with an LS1+ 6 speed swap into an old car. on first start attempt, it immediately set the three codes and will not fire. I believe PCM is preventing start because it can not control throttle. I used my DSO ... |
May 21, 2026 |
