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Code 404 egr sensor fix

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Hi my name is Allen!

The code 404 doesn't mean anything unless you read the code book, but if its pertaining to the EGR Valve Position Sensor Low or High. This means the EGR Sensor is stuck and the EGR Valve will need to be replaced and the code cleared.

For futher assistance contact me at FixYa!

Posted on Jan 02, 2009

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Posted on Jan 02, 2017

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I have codes p0404&p0405 on a 98 Chevy Malibu 2.4, what can I check and how to fix?


codes p 0404 refers to exhaust gas recirculation (EGR) system---range /performance====causes hose leaking/blockage---wiring---EGR valve /solenoid
code p 0405 refers to EGR valve position sensor A---low input===causes ---wiring short to ground --EGR valve position sensor ---ECM
replace the egr system is a good option

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P1401


Without all the technical detail -your EGR Valve is bad

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I have a 2005 dodge magnum with check engine light on and i got a code that is P406 what does it mean and how do i fix it


EGR POSITION SENSOR CIRCUIT HIGH.
Possidle Causes:
(K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO (F857) 5-VOLT SUPPLY CIRCUIT.
(K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE.
(K34) EGR POSITION SENSOR SIGNAL CIRCUIT OPEN.
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I have a scan tool that says my egr valve system not ready on my Ford f150 5.4 and my catylist reads not ready how can I fix this problem


ABout EGR codes, there are alot choive to look or diagnostic... are you chec or replace the vacuum lines as well? If there is a leak, the DPFE will read incorrectly.

Did you reset the PCM or disconnect the battery after the repair? Assuming all fuses are good, the P1401 indicates a possible wiring fault. Check the connector. Is it clean? Is it pushed in all the way? Are the wires in good condition?

Since the DPFE has been replaced, likely there is a restriction in the EGR line some where. This could also be a bad EGR valve. But first ensure that the EGR valve vacuum line is attached and leak free.

If no problem found, then the EGR passageways in the throttle body should be cleaned. Carbon will build up and block the EGR flow.

If still no problem found, consider replacing the EGR valve.

Keep in mind this information from Ford Service CD...

P0401 - EGR Flow Insufficient Detected
The EGR system is monitored during steady state driving conditions while the EGR is commanded on. The test fails when the signal from the DPF EGR sensor indicates that EGR flow is less than the desired minimum.
Vacuum supply
EGR valve stuck closed
EGR valve leaks vacuum
EGR flow path restricted
EGRVR circuit shorted to PWR
VREF open to D.P.F. EGR sensor
D.P.F. EGR sensor downstream hose off or plugged
EGRVR circuit open to PCM
VPWR open to EGRVR solenoid
D.P.F. EGR sensor hoses both off
D.P.F. EGR sensor hoses reversed
Damaged EGR orifice tube
Damaged EGRVR solenoid
Damaged PCM

Perform KOER self-test and look for DTC P1408 as an indication of a hard fault. If P1408 is not present, look for contamination, restrictions, leaks, and intermittents

P1401 - DPF EGR Sensor Circuit High Voltage Detected
The EGR monitor checks the DPF EGR sensor signal to the PCM for high voltage. The test fails when the average voltage to the PCM goes to a voltage greater than the maximum calibrated value.
DPF EGR circuit open
VREF short to PWR
Damaged DPF EGR sensor
DPFEGR circuit short to PWR
SIG RTN circuit open
Damaged PCM

A DPF EGR PID reading greater than 4.5 volts with the key ON and engine OFF or running, indicates a hard fault.


Hope this helps (remember to rate and send us your comments about this answer).

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I have a P1170, and a P1195 What are these two codes?


P1170 HO2S Bank 1 Sensor 1 Circuit Fixed (Bank 1 Sensor 1) The ECM (engine control module) is getting a low or no signal from the front oxygen sensor on bank #1. Possible bad sensor or open sensor circuit.
P1195 EGR Boost Sensor Circuit There is a problem with the EGR (exhaust gas recirculation) system. Possible plugged or restricted passage or sensor / sensor circuit problem.

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Where is the EGR pressuure sensor at. Need to replace it.


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EGR valve are directly behind the intake manifold.

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I listen from Taurus owners that just had the same problem (EGR insufficient and EGR excessive) and they replaced the EGR valve and the 4 oxygen sensors (if you do this use Ford sensors). This didn't fix the problem; then changed the Vacuum Regulator Solenoid and a tube mounted sensor part numbers F63Z-9J459-AA, and 4U7Z-9J460-AA. this fixed my check engine light and code issues, as well as it stopped idling so high that it caused the trans to jump into gear. It sometimes jumped so hard that he thought he had a broken motor mount.

Good luck (remember rated this).

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I had two problems posted for my Ford Explorer 1998 P1400 Differential Press Feedback EGR Circuit low input Po455 Mod $10 3/4 EVAP EMISSION CONTROL SYSTEM LEAK (LARGE) How can I fix it and how can I go...


CODE PO455 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED.POSSIBLE CAUSE - CANISTER VENT SOLENOID STUCK OPEN OR.FUEL TANK PRESSURE SENSOR HAS FAILED MECHANICALLY.OR BAD FUEL CAP. CODE PO1400 -DIFFERENTIAL PRESSURE FEED BACK EGR SENSOR CIRCUIT LOW VOLTAGE DETECTED.POSSIBLE CAUSE -DPF EGR SIGNAL CIRCUIT SHORTED TO GROUND OR DPF EGR SIGNAL VREF CIRCUIT OPEN OR DPF EGR SENSOR IS DAMAGED OR HAS FAILED.I WOULD HAVE GARAGE OR DEALERSHIP TO USE THEIR DIAGNOSTIC EQUIPMENT TO CHECK OUT YOUR EMISSION CONTROL SYSTEM.AND EGR VALVE BECAUSE PARTS IS TOO EXPENSIVE TO BUY.IF YOU DONT NEED THEM.SEE YOU CAN REPLACE THE DPF EGR SENSOR AND THE CANISTER VENT SOLENOID.BUT IT COULD BE A LEAKING GAS CAP OR SOMETHING ELSE.SO LET GARAGE CHECK IT OUT.TO BE ON SAFE SIDE.NOW YOU CAN BUY THOSE 2 SENSORS AND IT COULD FIX YOUR RIDE.I KNOW MONEY IS TIGHT ECONOMY IS IN BAD SHAPE.

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