Throttle sensor is reading 0.7v, code P0122

THEGURUUU

MEMBER
2001 HYUNDAI ATOS
1.0L
4 CYL
FWD
MANUAL
55,232 MILES

I have a problem, fault is P0122 Throttle Sensor low voltage or short to ground, have replaced including MAP, ACS, plugs, leads, fuel filter and unit, air filter, oil + filter.
I did checked both sensors MAPS/TPS and wire harness until ECU, no broken wire or short to ground.
No engine light up.
Erased fault and it pop up again, P0122.

What are the pin numbers on the ECU for 5v TPS (brown and yellow I think)

MAP Sensor is reading 4.98v
Throttle Sensor is reading 0.7v

The strange thing is, the car goes very well no problem at all.

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1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

I am attaching the info on this sensor and this code. We need to run through this to determine what the issue is. You could be correct but I suspect we have another issue with the sensor.

The reason is, the .7 volts with the throttle pedal released is ok but we need to see what the voltage is as you depress the throttle. I be it doesn't move smoothly or it jumps around which indicates a sensor or wiring issue.

Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know what you find. Thanks

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