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. After shutting down and checking the oil it started and ran normally.

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. Disconnect connector, and measure at harness side. Go to Step 4.

Limped to a side street to check the oil level as an oil change was the latest action taken on the car. Garage Speck, p2138 mitsubishi. Barleyboy 15 Replies.

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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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The workshop manual doesnt seem to have them defined that I can find. Throttle opening degree is restricted. It was the ECU. You will need to get your keys reprogrammed after swapping ECU's. 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. After changing the APP sensor the problem still persisted. After shutting down and checking the oil it started and ran normally. Hate to take it to the Stealer Ship but it may be necessary. Research modifications, troubleshooting, maintenance, and Turbo kits. 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. Rather than changing a whole bunch of parts they should be more helpful. All rights reserved.

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After replacing the accelerator pedal assembly, reconfirm whether the diagnosis code is set. It was the ECU. Go to Step 5. I would like to keep my car even if that means doing all of the repairs myself but having to borrow money for thousands in repairs has me doing weights and balances with the "forced" option of trading in and buying new. 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. Did you ever figure this out? 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. 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. Even occurred after cleaning the pedal contacts so the Rostra was removed. AVS Forum. For a better experience, please enable JavaScript in your browser before proceeding. The code was back and the service light was on again.