What are my problems ????? Without testing we'd only be guessing . A lot of electronic's ,software , electrical ,sensors etc.... Hooking up a factory scan tool an viewing data input's an outputs from the different control modules on the vehicle is what should be done by a qualified technician . With any DTC - diagnostic trouble code their are diagnostic test's that need to be done an done correctly so parts are not replaced needlessly . Don't know what kind of scanner was used to pull the code P1440 but this is not a code for your vehicle . I would try a different repair shop .
SOURCE: Impala - trac off and ABS light along with service traction syst
THE PROBLEM IS WITH A HUB WHEEL SPEED SENSOR OR MORE LIKELY THE HARNESS LEADING TO THE HUB.
CHECK THE RESISTANCE AT THE HUB CONNECTION, IT SHOULD BE BETWEEN 900OHMS AND 1300OHMS. THEN SWITCH TO A-C VOLTAGE, IT SHOULD BE 100MV WHEN TURNING THE WHEEL BY HAND. IF BOTH CHECK OUT THE PROBLEM IS IN THE WIRING TO THE HUB.
THE RIGHT FRONT HUB USUALLY HAS A BEND, DOWNWARD THEN UPWARD NEAR THE CONNECTOR TO THE HUB. THAT IS WHERE THE PROBLEM USUALLY OCCURS.
NEW HARNESS WIRES CAN BE BOUGHT AT THE DEALER.
SOURCE: my back speakers on my trailblazer 2007 ls sometimes does'ntwork
make sure there pluged in if so you need to get new ones
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SOURCE: The "engine power is reduced" light comes on
po455 is Probable Cause[s]
1. Defective, loose or missing fuel cap
2. EVAP canister broke, hose cracked or not connected
3. Purge or vent solenoid defective
4 . Vacuum leak at engine po121 code po121 means Throttle Position Sensor/Switch A Circuit Range/Performance Problem . it is usually indicative of a faulty throttle position sensor or faulty wiring harness in the engine bay.
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