Now when I take off it goes from 1st all the way to Overdrive almost immediately & when I floor it it won’t kick down to lower gear? I suppose it could be, but I doubt it. The modern transmission is one of the most connected components on a vehicle. In the old days, there used to be a cable that was connected from the throttle to the accelerator. . Learn the causes, how to troubleshoot and fix this common engine problem in just under 45 minutes to drive trouble-free. Diagnostic trouble codes P0120, P0121, P0122, P0123, and P0124 are what will commonly appear. The two lights just stayed on. Below are common symptoms of a faulty TPS. The resulting loss of power will increase the demand on ignition. You’ll also need the applicable service information that includes wiring schematics and OEM diagnostic charts with test specifications for all the components that need to be checked. The only thing you should do is have it replaced as soon as you notice these symptoms occurring in your vehicle. Vacuum leaks most commonly occurs in the hoses, which is most prone to wear and tear due to the under-hood heat from the engine. With the passage of time, the sensor will start to get worn and may eventually have to be replaced. In some cases, it may be necessary to reflash (reprogram) the PCM or transmission module to cure a particular fault. You may experience slow acceleration, acceleration surge at both high and low speeds, hesitation or delay in acceleration, and other related symptoms. These are generally not easy DIY jobs. Is the engine struggling? Moreover, because of being passionate to learn about the recent happenings in auto industry, he doesn’t only provide great car maintenance tips, he also always updates latest trends in among car brands and share them in his own interesting viewpoint. If you find a transmission fault code, you may have to check the resistance of a solenoid in the valve body, its operating voltage or the­ ­frequency of its control signal from the ­computer. But with today’s electronic controls, you need a scan tool, scope and a multimeter. There is nothing you can really do to prevent this sensor from failing because it will just happen on its own. Otherwise, check for faulty coil packs. You should also check for any technical service bulletins (TSBs) that may be related to the transmission problem. In some cases, such as when the throttle plate sticks in the open position, the PCM may also initiate a “Fail Safe” or “Limp Mode” when code P1121 sets, in which case the automatic transmission may be prevented from shifting, and driver has no, or very limited throttle control. A throttle position sensor will generally fail simply from the wear and tear of driving the vehicle for many years. A bad throttle position sensor is the last thing that you will ever wish to have on your ride. You also needed a vacuum gauge to check the engine’s intake vacuum and the integrity of the vacuum modulator.