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.

Voltage obtained with the formula given below is more than 0.

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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. 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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Go to Step 2. After replacing the accelerator pedal assembly, reconfirm whether the diagnosis code is set. Clear the code, shut the ignition off and back on, re-scan and the code is back. Check of damage in 5VV line between accelerator pedal position sensor connector and engine-ECU connector. My father in law looked at the battery and felt that the negative terminal looked a little corroded and since we were out of ideas and suggestions, we might as well drive down to the auto store and pick up a new terminal connector and replace it. The "Service Engine Soon" light was on. Unfortunately nobody has a posted solution. 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. Repair the connector s or wiring harness. Go to Step 4. I dont know if that is true. Did you ever figure this out?

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Repair the connector s or wiring harness. Deals Forum. Check of damage in 5VV line between accelerator pedal position sensor connector and engine-ECU connector. Some people jump into traffic and depend on the acceleration to avoid conflict. JavaScript is disabled. STEP 9. The code was back and the service light was on again. After changing the APP sensor the problem still persisted. After shutting down and checking the oil it started and ran normally. Barleyboy 15 Replies.