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P2138 code 2005 honda accord

Originally happened last summer when the the positive cable slipped off the battery while driving. Now it comes and goes.

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Intermittent starting problems with my 1990 Honda Accord

Have you looked into your crankshaft sensor

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Transmission slipping problems

I hope you are aware that 1998-2002 Accord transmissions were troublesome, rarely lasted more than 70k miles, and the object of a recall. Should you need to rebuild the transmission, Honda has "Remedy" kit that solves recurring problems. I have a 1998, and this happened to me. If you are lucky, maybe just the torque converter failed, or is worn out, and replacement costs much less than transmission rebuild. Furthermore, these transmissions will positively not work with standard auto transmission fluid. You HAVE to use Honda ATF. Thanks for coming to Fixya.

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2005 pacifica 123k, My problem is that while driving warm or cold at lower speeds the vehicle feels like it shuts off or hesitates just for a second then is fine. Can happen several times in a short trip...

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I have a p2138 code and when engine light comes on it starts losing power and you to shut off engine and restart and it will go for awhile and it will happen again. next day no problem

There is a GM Technical Service Bulletin (TSB) on this issue, below is a summary;

#07-06-04-019A: Intermittent MIL/SES, DTC P2138 with Reduced Engine Power (Repair Instrument Panel (IP) to Body Harness Connector)

Models: 2005-2008 GM Passenger Cars and Light Duty Trucks (Including Saturn)
2005-2008 HUMMER H2
2006-2008 HUMMER H3
2005-2008 Saab 9-7X


Some customers may comment on an intermittent MIL/SES light Illuminated with a message center or an indicator that displays Reduced Engine Power. DTC P2138 - Accelerator Pedal Position (APP) Sensor 1-2 Correlation may be set. The voltage difference between APP sensor 1 and APP sensor 2 exceeds a predetermined value for more than a brief period. Refer to DTC P2138 in SI for further diagnostics.


On some vehicles, the IP to body harness connector, which carries the APP signal to the ECM/PCM, is located in the left hand kick panel area or inside the IP. Water intrusion into these areas could cause an electrical short in the APP circuits setting a P2138 code.


Note: Make sure that no add-on/aftermarket equipment is electrically connected to the APP signals or to the other ECM/PCM five volt reference or return lines. These can generate false P2138 and/or other ETC System DTCs. If there are other engine DTCs besides P2138, such as MAP sensor faults (i.e. P0107, P0108), resolve these first before attempting to diagnose P2138 DTCs.

Important: Refer to DTC P2138 in SI to confirm that the ETC pedal is operating correctly.

Locate the IP to body harness connector, which may be located in and around the left hand kick panel area or inside the IP. Check to see if there is a water leak into the area and repair as necessary. Use a water hose to determine the source of a water leak and effectiveness of repair. Some examples of potential water leaks are: A-pillar seals, sunroof drain lines (if so equipped) and windshield/cowl sealing. Finally, repair or replace the IP to body harness connector, making sure no corrosion or debris is left on or between the terminals.

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Check Engine light !

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Jun 01, 2009 | 2004 Honda Accord

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The most common problem causing this is fixed by simply resetting the gauge control module. This isnt a definite, but it is quick and is worth a shot, you can do it yourself. Follow these directions EXACTLY.
You will lose your radio settings doing this btw.
Make sure you have your radio code before doing this, you will need it.

1. Disconnect the neg battery cable and then disconnect the positive battery cable.

2. Touch the cables together(to each other, not the terminals) for about 2 minutes.

3. Reconnect the positive cable and then the negative cable.

4. Start the engine, it should work normally. (If not let me know and I will tell you your next option)

5. Next, Turn the car on, turn off all electrical stuff like AC and radio.

6. Let the car heat up to regular temperature, then let it idle for 10 minutes. (It may be a rough idle, the computer is relearning how to idle)

7. Shut the engine off.

8. Turn the key to the ON position(not RUN)

9. Make sure the window is all the way up. Now put the window all the way down.

10. Next, put the window all the way up again, and hold the up button for 5 seconds after it has reached the top. (this sets the window auto up feature)

Good luck

May 18, 2009 | 2005 Honda Accord

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Engine code for 04 Honda Accord p2138, What is it and were is it!!!!!

P2138 is the APP sensor (accelerater pedal postion). More than likely it is the sensor itself that is bad. Clear the code and see if the light comes back on, It may be an intermittent failure. The sensor is located under the hood by the right strut tower.

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Honda accord hybrid 2005 won't start in cold weather

Sounds like a fuse for the DC-DC convertor to battery circut or the DC-DC convertor. Check the fuses under the hood but DO NOT attempt to fix the convertor yourself because there are LETHAL amouts of voltage in the hybrid drive system.

Jan 18, 2009 | 2005 Honda Accord

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