P2138 mitsubishi

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Code No. Check code No. P accelerator pedal position sensor main circuit low input Refer to. P accelerator pedal position sensor sub circuit low input Refer to. Engine-ECU checks the accelerator pedal position sensor output signal characteristics for abnormal conditions.

P2138 mitsubishi

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Last week I was slowly coasting down my neighborhood street and suddenly I felt power loss in the car accompanied by the check engine light. The flagged code is P which represents a bad throttle position sensor. I have since replaced my throttle position sensor with 2 separate brand new sensors from the dealer, both of which have done nothing to fix the code. Today I spent half my day at the dealer fighting with them about how its just not probable that two brand new sensors are bad. They refused to do a voltage check on the pins of the sensor as the stickied workshop manual describes. This is where the second brand new sensor comes in. The tech flashed it twice with the latest version of code for my vehicle but there was no change. Coupled with a timing belt change and a few other repairs, I am exceeding the estimated market value of the vehicle and I am in a real bad spot. Does anyone have any suggestions that help me in any way here?

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In this video, our mechanic breaks down the P code, its symptoms, including poor acceleration and reduced power mode, and shows you how to diagnose the potential causes so you know what to do to clear the code. Want to watch more videos like this? Visit our video library for thousands of automotive diagnostic and how-to videos. As our mechanic explains in the video above , a gas pedal has two APP sensors to essentially serve as fail-safes for each other in case one triggers an error code. He uses an OBD-II scan tool to look at the data for both sensors to see whether the sensors are working normally. You can see if the data correlates by watching it on your scan tool as you press the gas with your car parked. We recommend addressing the issue causing code P as soon as possible. If the data changes, that indicates the issue is stemming from the pedal itself and not the sensor wires. You can also watch the data being graphed while you wiggle the wires to see if the data changes, which would indicate a wiring or connector issue is triggering P Disconnect the connector to further inspect it, and check for any corrosion in the terminals.

P2138 mitsubishi

Advertiser Disclosure. The voltage readings going to the Engine Control Module ECM from the throttle body position sensor and accelerator pedal position sensor do not match each other. On older vehicles, the throttle body was connected to the accelerator pedal via a throttle cable which was a mechanical link between the two. When you pushed the accelerator pedal the throttle body opened, simple as that. As vehicles became more powerful, emissions controls became stricter and better fuel mileage was a requirement, there needed to be a way for the Engine Control Module ECM to control the throttle more precisely. Thus, the drive by wire system was introduced. In this system, the accelerator has a sensor on it that detects how hard you are pressing on the accelerator pedal, and based on the information the ECM receives it commands the throttle body to open based on your accelerator input.

Icarly 2023

The accelerator pedal position sensor voltage used for the judgement is converted into the accelerator pedal position sensor voltage for the internal processing by the engine-ECU. STEP 7. There is an aftermarket cruise installed so I removed it and cleared the code. So the other corrosion of the terminal wire must have just been tripping out the PCM in some way and now, I hope, we are back in business. P accelerator pedal position sensor sub circuit low input Refer to. Go to Step 8. Repair the connector s or wiring harness. Any hunches as to were the problem is? I will not re-install it as this could be a potential hazard. Go to Step 7.

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They refused to do a voltage check on the pins of the sensor as the stickied workshop manual describes. The "Service Engine Soon" light was on. So the other corrosion of the terminal wire must have just been tripping out the PCM in some way and now, I hope, we are back in business. I honestly am not convinced my computer is the problem. Tags for this Thread accelerator , rpm limited , throttle. Top Contributors this Month View All. Coupled with a timing belt change and a few other repairs, I am exceeding the estimated market value of the vehicle and I am in a real bad spot. You will need to get your keys reprogrammed after swapping ECU's. Perform resistance measurement at accelerator pedal position sensor connector. I feel like I would have more issues and I have done enough google searching to find this to be a common problem with outy's and ralliart lancers. Did you ever figure this out? Unfortunately nobody has a posted solution. I happened to be in a good spot to consider alternatives so I traded up for a new car. Ignition switch is "ON" position.