Toyota p0121

As the throttle is opened, the reading measured in volts goes up.

How to Test a Throttle Position Sensor (TPS) - With or Without a Wiring Diagram

If the PCM detects that the throttle angle is greater or less than it should be for a specific RPM, it will set this code. If not, then replace the TPS and re-check. Check for an intermittent open or short in the TPS signal. The reason is because scan tools take samplings of many different readings over just one or two data lines and can miss an intermittent drop out.

Hook up your oscilliscope and watch the signal. It should sweep up and down smoothly with no drop outs or spikes. If no problems were noticed, perform a wiggle test. Do this by wiggling the connector and harness while watching the pattern.

Does it drop out? If so, replace TPS and re-check. If you have no TPS signal, check for 5 Volt reference at the connector. It should never have battery voltage. If it does, trace circuit for short to voltage and repair. Look for any water in the connector and replace TPS as necessary. The list of automotive Makes at the right edge of the screen. The currently selected ODB-ii codes is for the Toyota makes.

Enter the 5 character trouble codes in the search box and submit the search. If your OBD-II trouble codes are for a different car, select that vehicle series before searching for the diagnostic codes because not all OBD2 codes used by one manufacture are used by the other makes.

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What does this mean? Possible Solutions 1. Note: 1.Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module ECM.

In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor.

This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control. Get Access to Factory Service Manuals. Need more help? Get the P Toyota code diagnosed by a professional: Find a repair shop in your area.

Related Information. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P Toyota code? Have you replaced any parts? Any information is appreciated. Repair Importance Level: 3. Why is the Engine Light ON? Home - About AutoCodes. Posted and Edit by AutoCodes.We recommend Torque Pro. The throttle position sensor TPS is located on the throttle body. It is a type of variable resistor which changes its resistance value according to throttle position.

As the throttle is opened, the voltage reading goes up. This information is used by the PCM to determine output controls such as fuel injection and idle air control. Most throttle position sensors are simple and easy to troubleshoot. Power, or reference voltage, goes into the TPS. The sensor then sends a return signal voltage to the PCM. The return voltage depends on throttle positon. Typically, the signal value at idle will be about. When the gas pedal is depressed, the control module commands the throttle to open.

P0121 - Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance

Then, a pair of TPS sensors relay the throttle positon to the control module so it knows everything is working properly. A typical throttle position sensor.

Courtesy: autozone. To sum things up, the common causes for code P are as follows:. Symptoms consistent with a faulty throttle position sensor include: hesitation or stumbling upon acceleration, unstable idle, and an illuminated check engine light.

In some cases, a no-start condition may even result. Start with a visual inspection of the sensor and its wiring. Make sure the connector is plugged in and free of corrosion; and check for broken wires.

P0121 Toyota Corolla

Check the throttle body assembly for binding and signs of contaminant buildup. If the throttle body is visibly dirty, remove it and clean it with throttle body cleaner.When code P is triggered, your ECM will go into failsafe mode. Depending on the failsafe strategy of your car, this could lead to limited speeds or acceleration. This problem can also cause intermittent knocking and even stalling for your vehicle.

In some cases, the car will not be capable of driving to the shop and will need to be towed. Replacing the TPS or throttle body without attempting a throttle body cleaning. For error code P, one or more of the below repairs may be needed to solve the underlying issue. For each possible repair, the estimated cost of repair includes the cost of the relevant parts and the cost of labor required to make the repair.

The Regal was from a friend who wanted to sell it to me at a good KBB price. Thanks FIXD! My check engine light keeps coming on after replacing throttle position sensor. Should I clean throttle body? Please help.

toyota p0121

My jeep runs pretty good only thing is I get a lighting bolt sometimes and the engine light is still on I put a brand new motor in it. My Dodge ram I changed plugs still got a skip that it barley moves stalling out how to get it out of safe mode. Hi, I have a GMC 5. If I have a full gas tank no engine light on. Fill up and it goes away? I have no loss of power, no black smoke blowing out or any kind of a shifting problem?

I have no problem with the truck at all but the light coming on with a shorter tank of gas? New gas cap?? I also have a GMC 5. Wow, I guess this is common on the Gmc Yukon. I also have one and ran across this while trying to figure out my issue. I have a Volvo, out of the blue it had a lot of reduced acceleration, and an unresponsive throttle, then stalled on me while I was driving home one night. Super scary but it turned out okay for what it was.

I just replaced this sensor and the check engine light has come on twice within the last two weeks when I replaced it. David, did you find out the problem. Working on a Escalade Hybrid 6. Yes No P is a relatively common trouble code with the Toyota Camry. It is relatively serious problem since it can leave your vehicle in failsafe mode. Diagnosing it can be tricky without a good scanner and the knowledge of what you are doing. The symptoms of P are going to vary by year and model, but they certainly are going to cause noticeable changes in the way that your Camry drives.

This is what you need to address. A good mechanic will utilize a scanner to diagnose when the codes were set and reset them. If it all checks out and the code comes back, they may go ahead and replace the TPS sensor in question. Most of the time, the problem when P is thrown will be the TPS sensor itself. It no longer is accurately tracking how hard the fuel pedal is being pushed.

Diagnosing the issue with a scanner or having a mechanic take a look can save the expense of buying a TPS sensor that your Camry does not actually need. Good luck diagnosing P in your Toyota Camry.

toyota p0121

If there is anything that you would like to add, please leave a comment below. Toyota Camry P Symptoms The symptoms of P are going to vary by year and model, but they certainly are going to cause noticeable changes in the way that your Camry drives. Here are the most common symptoms of P The vehicle will hardly respond to the throttle at all.

This limited power is a failsafe to keep the vehicle able to move, but not super fast. The Camry may idle differently. Failsafe mode leaves a vehicle in a state that makes it almost impossible to drive and enjoy. Toyota Camry P Diagnosis A good mechanic will utilize a scanner to diagnose when the codes were set and reset them.Visually inspect the related wiring harness and connectors.

Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Malfunction is detected when an excessively low or high voltage from the sensor is sent to ECM.

This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module ECM.

toyota p0121

In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut.

toyota p0121

On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control. Get Access to Factory Service Manuals. Need more help? Get the P Toyota code diagnosed by a professional: Find a repair shop in your area. Related Information. Leave a comment below or tell us if the information above help you fix the code.

What are the symptoms on your vehicle for the P Toyota code? Have you replaced any parts? Any information is appreciated. Repair Importance Level: 3. Why is the Engine Light ON? Home - About AutoCodes. Posted and Edit by AutoCodes.Mavi Active Member.

So I got a P code which basically means the TPS sensor has gone bad, my car starting stalling, but not enough to stop, until at one point the engine shut off, the battery drained and I had to turn off the car and turn it back on after 10 minutes to get home very slowly.

Note: I did clean out the MAF and throttle body regularly with their own respective cleaners. You have to replace the whole thing Perfect, searched around through googles search and couldn't find that thread.

JimboPalmer Tsar of all the Rushers. You must log in or sign up to post here. Show Ignored Content. Similar Threads - P Throttle Body. Replies: 50 Views: 3, Mendel Leisk Feb 4, Replies: 3 Views: JC Dec 21, Full throttle poor power and whistling noise. Replies: 14 Views: Siber Pir8 Nov 30, Replies: 39 Views: 3, P and the red triangle. Replies: 2 Views: 1, Priumvirate Jun 5, Share This Page. Your name or email address: Do you already have an account?

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