Question about 2002 Honda Accord
Could it be the ignition wires
it is the Transmission Control Unit. you have to find the reason why the TCU is flashing the D4 fault code. not replace the unit. have your vehicle scanned for another code. your transmission or transaxle is giving you a warning that something is wrong .
Posted on Nov 21, 2008
An IAC (idle air control) motor is designed to adjust the engine idle RPM speed by opening and closing an air bypass passage inside the throttle body. The car computer or ECM (electronic control module) receives information from various sensors and will output signals to adjust the IAC motor in or out to adjust engine idle speed by controlling engine idle air.
An IAC motor is highly susceptible to carbon and coking build up; if an IAC goes too long without cleaning it can cause stalling and poor idle quality. Some cars are designed with a large vacuum transfer hose that connects the intake manifold to the IAC (idle air control) motor. If a broken or dilapidated these vacuum lines can cause the engine to lose vacuum which will allow the engine to run rough and die.
Inspect all engine and accessory vacuum lines to look for missing, torn or dilapidated lines and replace as needed. To check the IAC motor remove the unit, with the wires connected turn the key to the "on" position without starting the engine, the IAC should move in or out.
If the IAC motor does nothing it has probably failed, replace it with a new unit and recheck system. Note: while the IAC motor is removed clean (use aerosol carburetor cleaner) the passages the IAC uses to control idle air speed.
Good luck and hope this helps
Posted on May 08, 2009
sounds like a possible bad ground wire, you will need to find out where these 3 items ground and see if they have a ground point in common.
Posted on Oct 13, 2009
The part from the dealer is $180.65 ,labor is .5 hours about $50. If you go to a independent shop the cost should be less:)
Posted on Nov 24, 2009
The same thing happened to my 2003 Honda Accord...took it to the dealership, and they had to replace my shift lever entirely. Something about the cable between the ignition and shift lever not being read correctly...(basically, my car is not reading that it's actually in park and therefore won't release the key)....
Posted on Dec 04, 2009
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