P2138 mitsubishi

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Remember Me? Results 1 to 6 of 6. Garage Spot. Limped to a side street to check the oil level as an oil change was the latest action taken on the car. It was slightly over filled. The "Service Engine Soon" light was on.

P2138 mitsubishi

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. Ignition switch is "ON" position. Change of accelerator pedal position sensor main output voltage per 25 milliseconds is less than 0. Voltage obtained with the formula given below is more than 0. Throttle opening degree is restricted. Throttle opening degree position is in default position if accelerator pedal position sensor sub fails. Failed accelerator pedal position sensor Harness damage in accelerator pedal position sensor circuit or loose connector contact Failed engine-ECU. STEP 1. Perform resistance measurement at accelerator pedal position sensor connector.

Replace the engine-ECU.

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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.

P2138 mitsubishi

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.

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I dont know if that is true. Check end. All rights reserved. My local Mitsu techs were nice enough to diagnose it for free. Rather than changing a whole bunch of parts they should be more helpful. 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. They refused to do a voltage check on the pins of the sensor as the stickied workshop manual describes. STEP 8. Explore Our Forums. Change of accelerator pedal position sensor main output voltage per 25 milliseconds is less than 0. Replace the accelerator pedal assembly. Throttle opening degree position is in default position if accelerator pedal position sensor sub fails. STEP 2. I also thought about pulling my intake tube off and examining my throttle body internals to make sure its not slightly stuck open or something.

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P accelerator pedal position sensor sub circuit low input Refer to. Deals Forum. Top Contributors this Month View All. Garage "Bernie"? 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. Check end. I'm having the same issue and also have the rostra cruise control. This is an older thread, you may not receive a response, and could be reviving an old thread. Explore Our Forums. 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. Hate to take it to the Stealer Ship but it may be necessary.