Engine light came on, took it to the house. Code po122 popped up-TP Sensor open/low e.f.i. What do i need to fix the problem?

what vehicle are you working on? Hard to trace circuits when the poster doesn't tell us the vehicle

Flashing Diag Code P0122
TP circuit low input
DETECTION CONDITION
• If PCM detects TP sensor voltage at PCM terminal 89 below 0.10 V after engine start, PCM determines
that TP circuit has a malfunction.
POSSIBLE CAUSE
• TP sensor malfunction
• Connector or terminal malfunction
• Open circuit between TP sensor terminal C and PCM terminal 89
• Short to ground circuit between TP sensor terminal C and PCM terminal 89
• Open circuit between TP sensor terminal A and PCM terminal 90
• Short to ground circuit between TP sensor terminal A and PCM terminal 90
• PCM malfunction

Flashing Diag Code P0123
TP circuit high input
DETECTION CONDITION
• If PCM detects TP sensor voltage at PCM terminal 89 is above 4.77 V after engine start, PCM determines
that TP circuit has a malfunction.
POSSIBLE CAUSE
• TP sensor malfunction
• Connector or terminal malfunction
• Open circuit between TP sensor terminal B and PCM terminal 91
• Short to reference voltage (Vref) supply circuit between TP sensor terminal C and PCM terminal 89
• PCM malfunction

Possible but I doubt it.
The code means the computer is not getting a signal back from the sensor.
To test the sensor you would have checked for the reference voltage on the yellow wire, then check the resistance of the sensor with a meter.
You probably don't have voltage going to the sensor, or else the harness is bad between the sensor and the computer.
The return voltage is low at idle and goes up as the throttle is opened. ( I think )

code p 0122 causes are wiring short to ground , TP/APP sensor --ECM
or also wiring open/ short to ground / short to positive TP/APP---ECm
so check the wiring and connections
code p 0107 is map and /or BARO sensor --low input===causes ---wiring short to ground ---MAP sensor ---BARO sensor--ECM

108 Map sensor or pcm computer,113 IAT sensor or pcm,122 TP sensor or pcm, 700 Automatic trans computer or pcm, 733 Automatic trans leak or low pressure, 733 leak low pressure Your main computer(pcm) is shot start there. Then possible trans computer shot also(TCM)

A GM PO122 code means that the the car's computer has detected that the TPS ( throttle position sensor) is reporting too low a voltage.

CODE P2135 THROTTLE POSITION SENSOR 1 - 2 CORRELATION ERROR CONDITIONS, POSSIBLE CAUSES TP SENSOR 1 SIGNAL LOW REFERENCE OR 5V VREF CIRCUIT IS OPEN, TP SENSOR 2 SIGNAL LOW REFERENCE OR 5V VREF CIRCUIT IS OPEN, TP SENSOR 1 SIGNAL CIRCUIT IS SHORTED TO THE TP2 SIGNAL CIRCUIT, THROTTLE BODY ASSEMBLY IS DAMAGED OR IT HAS FAILED.

Hi, I'm not sure these are related. The first is your throttle position sensor. This tells the engine how hard you are pushing on the accelerator. The second code is random misfire., which I've never seen caused by the TPS. That said, I would fix the TPS first. Check the wiring and connector for any issues. If the wiring looks good, I would replace it and calibrate the new sensor. If this doesn't clear up the code 300, please read my post on misfires for additional troubleshooting steps: http://www.fixya.com/cars/r6715318-causes_gasoline_engine_misfires . These are generic instructions.

Trouble Code: P0123

TP Sensor Circuit High Input
Possible Causes:


TP Sensor sweep TP Sensor ground circuit is open TP Sensor signal circuit is open or is shorted to VREF (5v) TP Sensor is damaged or has failed (an internal open circuit) Possible intermittent condition PCM has failed

Trouble Code: P0300

Multiple Cylinder Misfire Detected
Possible Causes:


Air leak in the intake manifold, or in the EGR or EVAP system Base engine mechanical fault that affects two or more cylinders Erratic or interrupted CKP or CMP Sensor signals Fuel delivery component fault that affects two or more cylinders (i.e., a contaminated, dirty or sticking fuel injector) Ignition system problem (coil or plug) in two or more cylinders Vehicle driven with low fuel pressure or while very low on fuel

P0122 - Throttle Position (TP) Sensor Circuit Low Voltage, I would just replace the TPS as they are a known issue.

The code means: TP Sensor Low Input