How can I tell if my TPS has gone bad?
One of the most common ways to tell that a car’s TPS has gone bad is that the engine warning light is on. Do note that many other issues can activate the check engine light, and there might even be a chance that you’re getting a false reading. Just to be sure, borrow an OBD-II reader and perform a system check.
How to test the throttle position sensor ( TPS )?
Symptoms Of A Bad Throttle Position Sensor (TPS). How The Throttle Position Sensor (TPS) Works. Where To Buy Your TP Sensor And Save. Circuit (Wire) Descriptions Of The TPS. START HERE: Troubleshooting The TP Sensor. TPS TEST 1: Testing The TPS Voltage Signal. TPS TEST 2: Verifying TPS Has Power.
How is the TPS signal used in the engine?
The TPS signal is continually measured and combined many times per second with other data such as air temperature, engine RPM, air mass flow, and how quickly the throttle position changes. The collected data determines precisely how much fuel to inject into the engine at any given moment.
What do you need to know about replacing TPS?
Replacing the TPS will include clearing relevant fault codes, and may require software reprogramming of the new TPS module to match other engine management software. This is all best left to a professional mechanic who can provide you with a diagnosis, and then install the correct replacement part.
What does the Check Engine light on a TPS sensor mean?
If your TPS sensor has turned on the check engine light, you may need to clear it with a scanner. The check engine light will not always go away after replacement of the TPS. The TPS monitors the position of the throttle valve, which regulates how much air is supplied to the engine.
Why is TPS signal voltage high and low?
I changed the MAF sensor, idle air control and finally the throttle position sensor a few weeks ago. None of this fixed the problem. However, this morning the CEL finally came on for about 10 seconds, then turned off. It stored codes 21 AND 22, meaning that TPS signal voltage was both high and low.
How does the TPS monitor the throttle position?
The TPS monitors the position of the throttle valve, which regulates how much air is supplied to the engine. Your gas pedal is attached to the the throttle valve (either electronically or mechanically) — as you press the pedal farther in, the valve opens more.
How can you tell if your TPS unit is failing?
TPS units sometimes fail in a way that causes the voltage signal sent back to the engine’s computer to be sporadic. This can feel like you are quickly applying and releasing the gas pedal. 4. Your engine surges and stalls out. A failing TPS can cause the engine to search for an idle or surge.