Q: Fault code p0120

asked by on February 11, 2017

I have a Suzuki wagon R and fault code p0120 came up . I changed the throttle body position sensor and reset the code but it keeps coming back. Any ideas what else it could be thanks

My car has 85000 miles.
My car has a manual transmission.

Throttle Position Sensor Replacement $129.21 - $646.10 Get a Quote

Diagnostic trouble code P0120 sets when the ECM (or PCM) receives an output from TPS sensor circuit A that is outside of the specified voltage range in relation to TPS sensor circuit B. The code will also set if TPS sensor circuit A output falls below .2 volts or goes above 4.5 volts, although the exact voltage range is specified in the Factory Service Manual for particular vehicles. Inasmuch as you have already replaced the sensor, the problem may lie in the connector or circuit wiring, that is the wiring back to the ECM. You should inspect, repair, or replace the TPS connector and the wiring as necessary. If you want these steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a TPS sensor diagnostic/inspection and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

The check engine light comes on when turning the steering wheel.

Hi there. When the check engine light comes on when turning the steering wheel, this usually is for the power steering system. There could be an issue with the power steering pump or the rack and pinion steering system. I...

my car vibrate

This question will need to be more detailed for me to give helpful insight on this problem. For example, it's important to know when you are getting the vibration and if you feel it in the steering wheel or more...

Check Engine light on - camshaft

Hello. The camshaft is a sensor that reads the revolutions of the camshaft. When the sensor malfunctions it is not reading the camshaft revolutions, causing the car computer to think it’s out of timing. This usually causes the car to...

Fuel Rail System Error Code

Considering that the code is related to a problem in the fuel system, you should leave it to the professionals to avoid personal injury. When fueling the car, check twice to make sure the fuel cap is fastened properly. Low...

Rear window not staying up

Hi, this could be a number of different things. I will give you a couple reasons. It could be the window regulator stopped functioning or the electrical system could have stopped working in the window motor. The fuse and wiring...

Window stopped working

Hi. The power window system is pretty simple. Pressing the up button applies power to the DC power window motor. The motor then lifts the window via the regulator, which is a scissor-type lifting device. Pressing the button down reverses...

Power steering is hard, softens when I accelerate

Well given the symptoms, it sounds like the power steering pump is not putting out adequate pressure. When you replaced the power steering pump, did you use an OEM pump? If not, I would suggest having the power steering pressure...

When accelerating the car begins to jerk real bad.

Usually when the Check Engine Light flashes, it is an indication that you have a severe misfire that may cause damage to the catalytic converter. Most of the time this is due to failing ignition components. That is why it...

Car died after battery, brake, and Check Engine light came on.

Hi there. When you get this combination of warning lights and symptoms it is typically the result of a battery that has failed. If the battery voltage gets low enough then the check engine light and the brake light can...

Related articles

P0154 OBD-II Trouble Code: O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)
P0154 trouble code definition 02 Sensor Circuit No Activity Detected (Bank 2 Sensor 1) What the P0154 code means The oxygen sensor’s...
P0479 OBD-II Trouble Code: Exhaust Pressure Control Valve Intermittent
P0479 code means there is an out-of-the-ordinary voltage reading from the exhaust pressure control valve circuit often due to damaged wiring.
P0621 OBD-II Trouble Code: Generator Lamp “L” Control Circuit Malfunction
P0621 means there is an malfunction with the generator lamp "L" control circuit often due to a defective generator or corroded wires.