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james Posted on Sep 04, 2015
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How do i fix code 0743

2003 honda pilot d light always flashing after changing engine change o2 sensor add transmission fliud

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Bill Boyd

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  • Honda Master 53,816 Answers
  • Posted on Sep 05, 2015
Bill Boyd
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The only honda code I found is p0743 and that refers to torque converter clutch (TCC) solenoid ---electrical===causes ---wiring---TCC solenoid ---ECM/TCM
if you can comment with the symptoms other than what you have stated some one else may have a better answer.

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2011 Honda Odyssey. Check engine light is on. 2 Codes read P0430 with other things like 1 Inc, O2 sensor, O2 heater, Evap, 7 ready, misfire, fuel, computer, catalyst, EGR.

Question edited for clarity.
Question moved to model category.

You say you 'changed the spark pug' (singular), did you only change one? When one fails, the rest are going to follow.

Your O2 Sensor and O2 Heater are probably the same sensor that is failing. When they fail and are running lean, they dump fuel and that soots up the Catalytic Converter, so there is your other code. Replace the sensor that is causing the issue and run some Extreme Clean Catalytic Converter Cleaner in the fuel. You might need two treatments.

You need a good auto electrician

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P0430 Code: Catalyst System Efficiency Below Threshold ...

CarParts.com https://www.carparts.com > blog > p0430-code-catalys...
Oct 29, 2021 - P0430 is a diagnostic trouble code (DTC) for "Catalyst System Efficiency Below Threshold (Bank 2)." The code warns about a problem with the ...

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2003 Honda Pilot Codes

Code P1740 indicates that there is a problem with the 4th clutch pressure switch. This code will set if there is an internal hydraulic problem also, and the 4th clutch does not fill fast enough or there is low pressure in the automatic transmission.Jan 1, 2019

P1740 code. 2004 pilot. Can I change switch myself or have it ...

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Honda >> Pilot 3.5L (2003 - 2004) - TroubleCodes.net

www.troublecodes.net > honda > pilot-3-5l-2003-2004
Trouble codes can only be erased by using a Scan Tool connected to the data link connector (DLC) 1. Trouble code identification. Flash code, OBD·II code, Fault ...

Most Complete List For Honda Check Engine Light Codes

www.engine-light-help.com > honda-check-engine-light
Below you will find the most complete list of Honda trouble codes available. The code definitions are a good starting point when determining the cause of the ...

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Why is the "D"ligh blinking while car is moving on a 2004 honda pilot?

First check you fluid level while the auto is sitting level, warmed up and in Park. If that doesn't help you, then I found this earlier posting of the same issue and something here might help. *** anyone have the same problem??? **** out of nowhere the D/drive light started flashing. Took it out of gear to neutral, the nuetral light comes on but the D light is still flashing. Turned the engine off, started it back up and everything is back to normal. Normal for a month, then it happened again. Turned off the engine off, restarted and everything is back to normal. The car shifts / drives like normal all the time. Nonetheless too it to a shop, and they tried to pull the codes, but got nothing. Advised me to go to HONDA as they may be about to pull the code using the HONDA's computer reader. jmtnh answered 4 years ago The flashing light indicates a transmission problem. I think it has to go to the Honda dealer to read the code. I had the same thing happen. I decided to check my fluid level first, sure enough it didn't even register on the stick. I just needed fluid. I don't think I would have gotten off that cheap if I had taken it to the dealer. RV_IN_KC_1 answered about a year ago I experienced the same light illumination. Shifted to neutral, or any other gear, and light still kept blinking. Pulled off the road and turned off the engine. Restarted engine, blinking light was gone. Didn't reappear as I drove on to the destination. Checked the display at lunch, no blinking light present. Also checked the transmission fluid level, no problems there. It sounds like it may be another one of Honda's infamous phantom faults that they want to charge about a hundred bucks to say they don't know why, and that they reset all the codes so it shouldn't be a problem, Perhaps they believe they should get a hundred dollars from every Honda owner periodically, so they just program the codes to come on randomly, and not show up in the history, so nobody else can find them. Yes, I am more than somewhat skeptical of the major auto industry these days, this isn't the first instance of phantom codes, but they still charge you for their poor design and poor information. If they really cared about owners, they would leave some of the usless info out of the owners guide and put in a table of all the codes and light illuminations, with the radio or dash readout connected so the codes could be displayed for the owner. Then we would know if it is a critical thing, or simply a friendly reminder that an oil change is needed, or something of that sort. Why all the mistery? A HUNDRED BUCKS, OF COURSE!!!!!! David answered 2 months ago Same problem on my 2007 Pilot LX. Changed fluid (never get this transmission or any transmission flushed!) - takes 3 cycles to get transmission fluid completed. Only one done so far. Light still comes on and will not register a transmission code. Mechanic tells me not to worry unless you sense there is a genuine problem with shifting. Light may have to be on for a very long time for a code to register. JB1974 answered 2 months ago I had the same problem on my 2005 Pilot. The code read "4th gear clutch pressure sensor". My son is a mechanic and I told him that it shifted fine and he said that if the pressure is not right on the 4th gear band in the transmission, it could wears uneven or even out and that could mean alot more money fixing the transmission
0helpful
1answer

I aready changed the ho2 sensor 1.why also start the engine after second check engine lights also come.i scandal the code also same.HO2S(S1)failure.how to fix for honda accord 2.0CC model SDA

there is a difference in the operation of a HO2S and a O2 sensor and replacing the wrong will not fix the problem
one(HO2S) reads the gas mixture before the cat converter and the other (O2)after the cat converter
0helpful
1answer

In my Honda Pilot 2006 the engine light and VTM-4 light is on. What can I do to fix it?

engine lights also report on transmission faults
best have the fault codes read to get an indication of which sensor/s set the light on
0helpful
1answer

What is the cause of the P0325 error code in a 2008 honda pilot? is the code related to the O2 sensor?

That is a knock sensor code. It is in the valley below the intake. Rodents like to eat the wires to it, look for that. The sensor can fail, too.
1helpful
2answers

1998 honda accord check engine light on code p0141

SECONDARY HEATED O2 SENSOR HEATER CIRCUIT FAULT SENSOR 2.
2helpful
4answers

Code PO131

Code PO131 is O2 sensor circuit low voltage , bank 1, sensor 1. That sensor I would say is the one in the exhaust manifold. I would check voltage to the sensor from the computer. If the voltage is not 5 volts, then it could be a computer problem or a wiring problem. I have seen factory wiring and connectors give a voltage problem. Check for a damaged or burnt, pinched wire. You need to know for sure that the voltage is correct to the sensor. Intermittent problems are hard to trace , but patience and knowledge helps.
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