Exhaust gas recirculation insufficient and idle air recirculation were part of the information fed from the machine. However, after repair all these are gone but left with PO 325. What could this mean or be to the car?
Code p0325 refers to knock sensor1 bank1--circuit malfunction===causes--wiring--poor connection ---knock sensor.. Check wiring and connections are clean and tight or replace the knock sensor.. The knock sensor adjusts the air /fuel mixture for proper combustion and reads when there is detonation occurring in the cylinder( Rattling-tinny sound under acceleration)
SOURCE: i'm getting dtc code of 0401
this code means in most cases the EGR exhaust gas supply passage is plugged in the intake manifold, to test this just hold the EGR open at idle it should make the engine run very rough and then die, if not the passages plugged with carbon residue and must be cleaned. This code is common on cars with over 100,000 miles.
SOURCE: The yellow check engine lights
Replace the EGR valve. There is no other fix and the EGR valve is not serviceable.
SOURCE: Error code D0401 exhaust gas
on just about all of the ones that i have seen this code for there is carbon built up in the intake passage to the egr valve.......you can look at the intake where the egr valve is and follow the passage to inside the throttle body and on the inside the throttle body behind the butterfly or the flap there is a hole or passage that goes to the egr that will get carbon built up in it and restrict the air flow from the egr valve......the hole or passage is on the top side of the throttle body and the way that i check the passage is with a small round mirror and a flashlight and find something or someone to hold the throttle open while i look for the blockage.....but before you go through all of this take a hand pump vac gauge and a piece of vac line and hook it up to the vac line to the egr valve.with the gauge all hooked up start the car and start pumping the vac gauge and see if the car will die and if it doesnt start looking for blockage in the intake........let me know if i can help you any further and let me and fixya know if i was any help to you and a thumbs up if i did help you in anyway........if you dont have access to these tools then to save a little money the charge to check this and to fix the carbon build up at my shop is not that expensive.........good luck and let me know how everything worked out..............thanks.......
if you are handy find a video from ericthecarguy on YouTube. he will explain it better than I. Basically clean all passages in the EGR system.
Connect white (test lead) and black (ground lead) wires that are branched from harness approximately eight inches from ECM. After leads are grounded, the "Check Engine" light will flash the diagnostic trouble codes. The DTC's are indicated by the flashing CEL.
FLASH, FLASH, pause, FLASH, FLASH, FLASH = Code 23.
If only one diagnostic trouble code is stored, the DTC will repeat continuously until test leads are disconnected. If more than one diagnostic trouble code is stored, each DTC will repeat three times, starting with the lowest, then proceed to the next DTC. After all DTC's have been displayed, the pattern will repeat.I-MARK 84-85
Connect male and female test leads taped into wire harness near ECM. After leads are connected, the "Check Engine" lamp will flash the trouble codes. The DTC's are indicated by the flashing CEL.
FLASH, FLASH, pause, FLASH, FLASH, FLASH = Code 23.
If only one diagnostic trouble code is stored, the DTC will repeat continuously until test leads are disconnected. If more than one diagnostic trouble code is stored, each DTC will repeat three times, starting with the lowest, then proceed to the next DTC. After all DTC's have been displayed, the pattern will repeat.
86-87 Impulse located near the ECM connector, is used to actuate the Engine Control Module (ECM) trouble code memory within the module. Two terminals (A and C) of this connector are used to activate the diagnostic trouble code system in the ECM. With the ignition switch turned On, engine Off, connect a jumper wire between terminals A and C. The "Check Engine" lamp will begin by flashing a DTC 12. DTC 12 = flash, pause, flash, flash. There will be a longer pause and a code 12 will repeat two more times. This code indicates the self-diagnostic system is operating. The cycle will then repeat until the engine is started or the ignition is switched Off. In most cases, DTC's will be checked with the engine running since no DTC's other than DTC 12 or 51 will be present without the engine running. Remove jumper wire from ALDL connector before starting engine. Reconnect jumper wire after engine is running.
Throttle Body Fuel Injection
The ECM test connection is located under the center console.
A built-in, self diagnostic system will identify problems in the throttle body fuel injection system. When a problem is detected, the diagnostic system will illuminate the "Check Engine" light.
When the engine is started, the Check Engine light should turn off.. If the light remains lit, the self diagnostic has detected a problem. To determine where the problem exists, ground the "Test" terminal of the connector with the ignition On, engine Off and watch the check engine light. Each DTC will flash three times (lowest to highest).
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