Replace it if the voltage spikes or it has no voltage at the signal wire. Place a small amount of electrical grease on the terminals and reconnect it. A few points about the electronically controlled throttle. Clean any corrosion using a small pocket screwdriver. On inspection, you will notice a flat plastic cover on the top of the throttle body. It's been my experience that the wiring connector or "pig tail" on the throttle body gives problems in the form of a poor connection.The female terminals on the pigtail corrode or pull out of the connector. When both voltages agree, the system is functioning properly. Starting in early 2000’s, many car makers including Ford started installing fly by wire electronic throttle bodies. The pin that centers and supports the gear fits into the throttle body housing and the top pin fits into the "thin" plastic cover. Although the code has the same frame of reference, it is worded slightly different on some brands, such as "Throttle position sensor circuit range/performance" on an Infiniti or "Electronic throttle control system malfunction power management" on a Hyundai. Remove the throttle position governor and use up to 100% of your vehicle throttle before you reach 40 mph. your question in our FREE car repair forums. Would have to be done at the dealer but now can be done through the GT. Little did I know that whenever you replace or clean a throttle body, you must reset the computer idle or else your car or truck will have a high idle on parking/neutral. It will have 5 volts for reference and next to it a varying signal. Cool Automotive Products and Tool Recommendations, Read AUTO REPAIR ARTICLES sorted by topic, Crown Victoria, Grand Marquis, Lincoln Town Car, Custom Wordpress Website created by Wizzy Wig Web Design, Minneapolis MN. These TSBs result from customer complaints or recognized problems and the factory recommended repair procedure. Wait 10 seconds and depress the pedal again for 10 seconds and release. Q How do I relearn the throttle body on a 2015 5.3 Chevy Silverado I have the ported 6.2 throttle body and intake manifold and I think that the idle isn't correct cause you can hear a whistle coming from the throttle and the check engine light comes on when at idle answer now For example, trigger the lights when rpm exceeds 6000 rpm, or when trans temp exceeds 230 F and coolant exceeds 210 F, or when air fuel ratio is above 12.5 and throttle is above 75%. With a voltmeter, probe the accelerator pedal sensor. For example, on a Nissan, turn the ignition on and wait 3 seconds. The new "electronic throttle control" technology consists of a accelerator pedal position sensor, an electronically controlled throttle body complete with an internal motor, two embedded throttle position sensors for correlation factors and the engine management computer. It's mission is to afford greater control over the emissions, fuel economy, traction and stability control, cruise control and transmission responses. Has high intensity warning lights that can be set using a 1 or 2 parameter algorithm. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model. The voltage should climb from .5 to 5.0 smoothly. One drop or rough handling and it's history. Possible bare wire on pigtail shorting to ground. In those vehicles, the “gas” pedal isn’t connected to the throttle body by a cable. Inspect the top cover on the throttle body for cracks or warping. Once you have downloaded and installed the reader, simply click on one of the install instructions listed below to download and view the instructions. What does that mean? Dec 9, 2020. During the period the PCM will command the throttle body plate to sweep from full open to full close to “learn” the new positions. Symptoms of a P2138 code can range from stalling when you come to a stop, total lack of power, no acceleration, sudden loss of power at cruise speeds or stuck throttle at current rpm. Within the next 5 … Two throttle position sensors imbedded in the throttle body convert the amount of throttle opening to a voltage signal to the computer. Then continue to let it idle for an additional 5 minutes. your question in our FREE car repair forums. Diagnostics and Drivability. Check online or in a service manual for a possible relearn procedure to reset the computer. The battery will be used for 30 minutes without the alternator available for charging. If you’re tracking down a wiring issue, Eautorepair.net is the better choice. The pedal simply provides an electronic signal, telling the throttle body how much acceleration you’re requesting. Dec 9, 2020. The automotive trouble code P2138 throttle/pedal position sensor/switch D/E voltage correlation refers to a problem related to the throttle's ability to open and close properly. The camshaft position sensor (CMP) is just one of the many electrical parts found in a vehicle. For example, on a Nissan, turn the ignition on and wait 3 seconds. But for the product itself. However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. ... • Release throttle when fuel cut-off occurs or if RPM value is exceeded. To perform a relearn on a Passkey II system, make sure there is a fully charged battery in the vehicle. Look for corrosion. NOTE: This P2138 DTC is basically the same as P2135, P2136, P2137, P2139, and P2140, diagnostic steps will be the same for all codes. 2) Run a jumper wire from the positive battery cable to the now disconnected negative battery cable terminal. Last Updated on January 19, 2021. Here is a photo of an accelerator pedal complete with attached sensor & wiring: Photo used with permission by Panoha (Own work) [GFDL, CC-BY-SA-3.0 or FAL], via Wikimedia Commons. Photo of a throttle body, throttle body position (TPS) sensor is the black part to the lower right: The computer monitors the correlation of both voltages. Pull the electrical connector out of the throttle body. The accelerator pedal sensor or its wiring failed. Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period. Lost Communication with Throttle Actuator Control (TAC) Module. Inspect it closely for missing or bent female terminals. The short circuit you’re creating here is designed to drain all power from the capacitors inside the PCM. Apart from the accelerator pedal sensor, the remainder of the components are in the throttle body. If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle. Contact Us If the cover is distorted in any way, the gear will be compromised requiring total replacement of the throttle body. The first thing to do is go online and get the TSBs (technical service bulletins) for you vehicle relating to the code. But when your battery goes dead or you disconnect it to work on your vehicle, the PCM “forgets” the adapated home position. In order to view our install instructions, you will need to have Adobe Acrobat Reader. It drives a large "plastic" gear attached to the throttle plate. The motor has a small metal gear protruding up through the housing under the cover. The engine management computer has failed. Within the next 5 seconds depress and release the pedal 5 times. Launch Tech USA. The TPS converts throttle movement and position to a voltage signal and sends it to the engine management computer, which uses the varying voltage signal to form engine management strategy. Launch Tech USA: Perform throttle body relearn using X-431 Throttle. It will eventually learn it on its own, but it may take over a week of driving, during which time you will experience high and low idle speeds and possibly rough idle. Normally I couldn’t care less about a Star Wars game, let alone a Star Wars racing game; but a few years ago Jake mentioned that the music is by Peter McConnell and is really good. Watch the engine temp gauge and note when it reaches operating temp. Installation Instructions. The TPS sensors were not correlating for a few seconds and the computer needs to be cycled through its relearn phase to restore active response to the throttle body, or the computer needs reprogramming at the dealer. During this period the idle may be higher than normal. When you depress the accelerator pedal you are pushing down on a sensor indicating the desired amount of throttle opening which is sent to the engine management computer. If there is power the throttle body is malfunctioning. When the check engine light begins to blink, release the pedal. Turn the ignition off. Check online or in a service manual for a possible relearn procedure to reset the computer. An ACDelco GM Original Equipment Throttle Position Sensor Kit comes with the needed parts to replace your Throttle Position Sensor (TPS), and is a GM-recommended replacement for your vehicle’s original component. Prior to this, the vehicle's throttle was controlled by a simple cable with a direct connection between the gas pedal and the throttle. you take on any vehicle. Turn the key on and slowly depress the pedal. When they deviate for two seconds, the code P2138 is set indicating a malfunction somewhere in the system. These are example steps, and not in any order. 6) Drive the vehicle at various speed so the PCM learns shift points. Wait 7 seconds, press, and hold the pedal for 10 seconds. All content © 2004-2021 OBD-Codes.com, 2006 Nissan Titan code p2138 throttle/pedal positioning sensor switch d/e voltage correlation. In most cases, their diagrams are right from the factory manuals. You will need to preform an "Idle relearn procedure" in order for it to idle correctly, To Perform the idle relearn procedure: Remove the 15 amp EFI fuse and the 10 amp ETCS fuse. Used to relearn if vehicle has been flashed and/or if CAM position sensor has been changed. We’ll go over what this component is, the symptoms of a bad camshaft position sensor, and what you can expect its replacement cost to be when it’s faulty. Ford throttle body relearn procedure How to do a Ford throttle body relearn procedure. Throttle/Pedal Pos Sensor/Switch D / E Voltage Correlation. The top cover on the throttle body distorted preventing the gears from turning properly. Other throttle related DTCs: P0068, P0120, P0121, P0122, P0123, P0124, P0510, & others. This system is incredibly sensitive and vulnerable to damage, more than any other system. If you’ve replaced your Ford electronic throttle body or you’ve disconnected the battery, you must do a Ford throttle body relearn to establish a new baseline idle. Do this with the negative cable DISCONNECTED from the battery. It should slowly drop as the engine heats up. This houses the gears to actuate the throttle plate. Diagnostics and Drivability. Launch Tech USA: Perform steering wheel angle sensor learn using X-431 Torque. Over time, carbon buildup can accumulate around the throttle plate, changing it’s “home” position. All information on this site is copyright protected. If you still need help regarding the P2138 trouble code, please post Throttle body relearn procedure for a Toyota Corrolla, Auris, Blade. CAM Variation Relearn. If you need to dig into your doors, dash or console, Alldatadiy.com is the better choice because Eautorepair.net doesn’t any interior or exterior trim or body part removal. If the terminal connector has bent or missing pins you can pick up a new "pigtail" at most auto parts stores or from the dealer. Probe the throttle body connector for power to the throttle motor. Leave the jumper connected for about 2-mins. If any are present, call the dealer and ask if they sell just the top cover. If the buildup occurs gradually, the PCM “learns” the new home position. Super Bombad Racer was a Star Wars racing game released for the PS2. Launch Tech USA. Handle it and its components with extreme care. This diagnostic trouble code (DTC) is a generic powertrain code. ACDelco GM Original Equipment Fuel Injection Throttle Body Heater Pipe is a GM-recommended replacement component for one or more of the following vehicle … 4) Turn the key to run and wait for all warning lights to turn off. He was absolutely right, the music sounds like Day of the Tentacle meets Star Wars and is well worth a listen. That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. The TPS reports the throttle position to the engine control module, which uses the signal to adjust fuel delivery and ignition timing. 2018 Silverado DTC P2138 - Stranded 3 times so far... 2006 Acura TL Error Codes P0134 P2251 P2138 P0134, Pilot 2005 - P0137, P2138, P0300 & P0302 to P0306, 06 Pontiac Grand Prix Base Model Codes P1125, P2138, P2125, post Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. It is not intended as repair advice and we are not responsible for any actions In response the computer sends a voltage to the electric motor to open the throttle plate. Have a helper turn the key on and slightly depress the pedal. Turn off headlights, blower motor, radio, wipers, etc. A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. Alldatadiy.com, on the other hand, uses the factory diagrams. (adsbygoogle = window.adsbygoogle || []).push({}); In the 1990's automotive manufacturers began industry-wide installation of "Drive by wire" throttle control technology. P1, P1 or P2, P1 and P2. NOTE. 1) Disconnect the negative battery terminal. If not, replace the throttle body. Additionally, the check engine light will illuminate and the code will be set. Pricing: ---Eautorepair.net--- 1 month subscription $19.95 per vehicle 1-year subscription $29.95 per vehicle 4-year subscription $44.95 per vehicle ---Alldatadiy.com--- 1-year $29.95 subscription: additional vehicles $19/95 each 5-year $49.95 subscription: additional vehicles $34.95 each Which one should YOU choose? It will continue to adjust idle during this period. This is a generic communication system diagnostic trouble code that applies to most vehicle makes and models, including but not limited to Dodge, Ram, Chevrolet, Ford, GMC, and VW. If no power is present, the computer is at fault. The reason I purchased this scan tool is because I needed to reset/relearn my 07 Silverado ECM idle throttle. Here’s a post on how to CLEAN A FORD ELECTRONIC THROTTLE BODY. NOTE: This information is presented for information purposes only. Additional trouble codes may accompany this code which further identify the problem. Turn off all electrical accessories before proceeding. Look online for wire terminal identification on the throttle body of your vehicle. 3) Reconnect the negative battery cable to the battery. A throttle position sensor (TPS) is situated opposite the throttle linkage connection on the throttle plate. So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations. 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