How do I fix error code P0121?

How do I fix error code P0121?

What repairs can fix the P0121 code?

1. Repairing or replacing the TPS connector.
2. Repairing the wiring as necessary.
3. Replace the TPS with a new sensor.

What would cause a P0121 code?

Your TPS “A” Circuit has an expected output voltage range, as does your TPS “B” Circuit (if so equipped). When code P0121 occurs, it means that your Engine Control Module (ECM) recognized that your throttle position “A” circuit’s expected output voltage has either gone above or below the sensor’s expected range.

How do you reset the throttle position sensor on a GMC Sierra?

The easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your engine control module.

What causes throttle position sensor code?

Code P0122 is triggered when your vehicle’s Engine Control Module (ECM) detects that your Throttle Position Sensor (TPS) circuit A is reporting an output voltage that is below its expected voltage. Depending on your vehicle, your TPS lower output voltage limit should be around .

How do you reset a TPS?

Hold the TPMS reset button until the tire pressure light blinks three times, then release it. Start the car and wait 20 minutes for the sensor to refresh. The TPMS reset button is usually located beneath the steering wheel. If you are unable to find it, refer to your vehicle’s owner’s manual.

What are symptoms of a bad throttle position sensor?

What Are The Symptoms and Signs Of a Failing Throttle Position Sensor?

• Lack Of Power. If your engine isn’t getting the fuel it needs, or is getting too much, you’ll notice that it doesn’t seem to be accelerating as it should be.
• Trouble Accelerating.
• Uneven Idle.
• Check Engine Light.

What happens when throttle position sensor goes bad?

When a TPS goes bad, then the car’s throttle body won’t function properly. It could either stay shut or it won’t close properly which is a severe issue. When the throttle gets stuck in an open position than your vehicle will receive too much air and cause it to have a high or fluctuating idle.

Where is the throttle position sensor located?

A throttle position sensor (TPS) is a sensor used to monitor the air intake of an engine. The sensor is usually located on the butterfly spindle/shaft, so that it can directly monitor the position of the throttle.

How do I fix the code P0171 on my Chevy?

What repairs can fix the P0171 code?

1. Replacing the fuel pump.
2. Replacing the fuel filter.
3. Replacing the fuel pressure regulator.
4. Replacing the powertrain control module.
5. Replacing one or more injectors.
6. Replacing one or more oxygen sensors.
7. Replacing the mass air flow sensor.
8. Repairing a vacuum leak.

What causes P0171 and P0174 codes Chevy?

A P0171 or P0174 trouble code can happen because of a vacuum leak or faulty sensor. Vacuum leak faults usually—not always—manifest more readily at lower speeds; as a rough idle, for example. A capable scan tool can check fuel trim values at idle and at higher engine speeds and detect when the lean condition occurs.

How do you test a GM TPS sensor?

How to Check the TPS Voltage on a Chevy Truck

1. Open the hood on the truck. Remove the engine’s air cleaner by removing the wingnuts.
2. Place the black probe from the voltmeter on the middle terminal inside the TPS. Place the voltmeter’s red probe on the the top, rearward terminal of the TPS.
3. Put the key in the ignition.

What is the trouble code on a Chevy Silverado?

P0121 Chevy Silverado. P0121 is a somewhat common trouble code with the Chevy Silverado. It’s an OBDII code and has to do with the Throttle Pedal Position Sensor.

What does the code p0121 mean on a Chevy Silverado?

P0121 is a somewhat common trouble code with the Chevy Silverado. It’s an OBDII code and has to do with the Throttle Pedal Position Sensor. It is relatively serious problem since it leaves your vehicle in failsafe mode. P0121: Throttle Pedal Position Sensor → Switch (TPS) A Circuit Range → Performance Problem

How much does it cost to repair a p0121 Chevy?

The cost to diagnose the P0121 CHEVROLET code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

What to do if your check engine light says p0121?

Replacing the TPS or throttle body without attempting a throttle body cleaning. Check to see if there are any other codes along with P0121 and clear your Check Engine Light with FIXD. Check freeze frame data relating to the ECM to help pinpoint the exact issue. Check all TPS connections visually for loose or damaged items.