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.

Clearing it turned the Service Engine light off.

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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. This system can also be used for traction control; if the ECM sees that the wheels are slipping, it can limit throttle opening in order to gain control of the vehicle.

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.

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Go to Step 9. Thanks for any thoughts. Does anyone have any suggestions that help me in any way here? Check end. Check code No. I happened to be in a good spot to consider alternatives so I traded up for a new car. The time now is PM. STEP 4. Tags for this Thread accelerator , rpm limited , throttle. 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. My local Mitsu techs were nice enough to diagnose it for free. Sign up. They refused to do a voltage check on the pins of the sensor as the stickied workshop manual describes. Clearing it turned the Service Engine light off.

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It was the ECU. Limped to a side street to check the oil level as an oil change was the latest action taken on the car. Sign up. Remember Me? STEP Failed accelerator pedal position sensor Harness damage in accelerator pedal position sensor circuit or loose connector contact Failed engine-ECU. Change of accelerator pedal position sensor main output voltage per 25 milliseconds is less than 0. I'm having the same issue and also have the rostra cruise control. 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. Thanks for any thoughts. Recommended Communities.