Question about Dodge Cars & Trucks
Dodge ram 1500 2002 5.9L
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Posted on Jan 02, 2017
That code is the EGR. I'd start by checking for a bad connection on the EGR plug-in. Pull the connector off and inspect each individual terminal inside the plug and the connector pins inside the EGR valve.
I found this solution at another forum on this issue. It worked on my 2001 Grand Am:
"Many GM built cars have a tendency to have the 'Check Engine Soon' light come on as a result of DTC code P1404. P1404 is described as EGR valve pintle stuck open, which in most cases is a false alarm. I had this happen with my '01 Grand Am. A little bit surfing on internet reveals that GM has a solution for the problem, a re-flash for the car's computer.
A software re-flash as a fix kind of indicates that the vehicles with this problem were built with it but I don't think GM will be re-flashing cars outside warranty for free. They will want their $100 for it.
Some hands on people I found had purchased a new EGR valve and changed it but the problem remained.
Possible reason (very likely) for the false P1404 code is that the plastic piston of the EGR valve position instrument (LVDT?) wears over time and starts reading a different position at valve closed than what it was when the EGR valve was first installed.
When the car was built and the computer circuits energized for the first time the computer learned the EGR valve closed position signal from the valve position instrument that is built on top of the valve itself. Over time, when the instrument wears, a slightly different signal is sent to the computer and when it differs enough from the 'Valve Closed Signal', that the computer had learned, the trouble code P1404 is set and the 'Service Engine Soon' light comes on.
Replacing the EGR valve with a new one does not necessarily fix this problem because the 'Valve Closed Signal' between valves is slightly different and it is just pure luck if your new valve would give a 'Valve Closed Signal' close enough to your original valve's signal not to set the trouble code. This is why the new EGR valve 'Valve Closed Signal' must be re-learned by the computer.
So, what this all means is that if the P1404 is a false code meaning that the valve pintle is not stuck open, then new 'Valve Closed Signal' can be re-learned by the computer using the old valve.
For fixing this problem the tool you need to have is a simple OBD II code scanner that can be used to erase trouble codes. There are many scanners of different price range on the market. I purchased one from AutoZone for about $90.
A code scanner is a very handy tool to have and I recommend everybody who is just slightly hands on type of a person to get one. It will end up saving a lot of money over time.
The fix goes like this:
1. Disconnect the wire harness from the EGR valve.
2. Turn key ON and erase the trouble code(s) from the car's computer AND TURN KEY OFF IMMEDIATELY WHEN THE SCANNER SAYS CODES HAVE BEEN ERASED. DO NOT TURN KEY ON BEFORE YOU RE-CONNECT EGR WIRE HARNESS.
3. Re-connect EGR wire harness and your problem should be fixed.
I learned this fix from OBDII.COM where carfixer and kozloski discussed it and I think kozloski was the one who provided the solution, so thanks to them.
There was also other people stating that this fix really works. Now I have joined this group of people as I got mine fixed using this trick also.
I believe erasing codes with wire harness disconnected and turning the key OFF right after P1404 code has been erased re-sets the 'Valve Close Position' reading in the computer and triggers computer to re-learn position next time the key is turned ON.
If you don't have an OBD II scanner and don't want to buy one some car part stores may erase the code for free, but if you have it done there you must tell them about turning the key OFF at the right moment. Other wise the re-learn process does not take place.
Posted on Feb 10, 2010
Dear Madam or Sir,
the code stands for:
Heated Oxigen Sensor1, Bank 1, Heater Control - circuit low.
So the heating of the O2 Sensor is faulty, you should see a mechanic to fix it.
Posted on Jun 27, 2010
SOURCE: I am getting a code
Welcome to Fixya
P0743 means Torque Converter Clutch Solenoid Circuit. Possible causes would be faulty torque converter clutch solenoid valve, torque converter clutch solenoid valve harness or connectors, torque converter clutch solenoid valve circuit is open or shorted, low transmission fluid level and dirty transmission fluid. Could be a problem to the harness to the TCC solenoid, the TCC solenoid connector or the TCC solenoid it self.
P0753 means 3-4 Shift Solenoid Relay. Possible causes would be a faulty shift solenoid valve,
shift solenoid valve harness or connectors, shift solenoid valve circuit is open or shorted, low transmission fluid level and dirty transmission fluid. The ECM has detected an open or shorted condition on the relay circuit.
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Posted on Jul 24, 2011
SOURCE: i have a 2002 dodge
you need a code manual from a parts store--try lookin it up online 1st---------there are over 1000 codes--it only gives a general idea unless you hook it up to a scanner that runs a data stream---without this replacin parts is a gamble
Posted on Sep 25, 2011
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