OBDI 307CID Code Questions

Ricker

NAXJA Forum User
1989 Pontaic Safari 307 CID CEL ON.
Three codes:
# 21 Throttle Position Sensor (Signal Voltage High)
# 34 Manifold Absolute Pressure Sensor Circuit (Low Signal)
# 44 Oxygen Sensor Circuit (Lean Exhaust Indicated)
How do they relate?
Where do I start?
Don't laugh, it's my daily driver that cash for clunkers did not get!
Rick
 
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