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.

Please consider creating a new thread. So the other corrosion of the terminal wire must have just been tripping out the P2138 mitsubishi in some way and now, p2138 mitsubishi, I hope, we are back in business.

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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.

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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Originally Posted by Mitz. This is an older thread, you may not receive a response, and could be reviving an old thread. This could be wire harness, sensor, computer or gremlins. To the person that gets my car AVS Forum. 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. During all of this, I made a comment about how just two days before I had to replace my battery and that is the only thing that changed in the target time that this started happening. Some dealerships agh. STEP 5. We were just looking for any loose black ground wire anywhere that could possibly explain a poor grounding issue that could cause this mis-read. Ignition switch is "ON" position.

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Unfortunately nobody has a posted solution. The code was back and the service light was on again. The dealer refused to test the voltage coming through the wires as the workshop manual suggests because their little MUT-II scanner gave them enough information to convince them it was the sensor. Guess they were wrong. STEP Found high resistance caused by insecure ground at ECM due to high paint build-up. It was the ECU. The limp mode has never occurred again since removing it. I sprayed the connector for the TPS as well as the connector for the throttle body with the connector cleaner and then applied dielectric grease to each terminal in the connector and reconnected. P accelerator pedal position sensor main circuit low input Refer to. Barleyboy 15 Replies. Cleaned ground and re-tested. Garage Speck. I believe it's an indication that the redundant pedal sensor is not reading the same or the transmission and the engine don't agree Has anyone seen this problem?