Question about 1998 Toyota Corolla

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I'm getting dtc code of 0401''exhaust gas recirculation flow insufficient detected'' what does this problem actually relate to, what is the solution plz help

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  • MUDSSIR AHMAD Jun 17, 2009

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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.

Posted on Jun 16, 2009

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Posted on Jan 02, 2017

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TROUBLE CODE PO402 FOR 2007 SILVERADO 2500HD CLASSIC 6.6 DIESEL


DTC P0402: Exhaust Gas Recirculation (EGR) Flow Excessive

The engine control module (ECM) tests the exhaust gas recirculation (EGR) flow when the EGR is in operation. EGR desired flow is compared to EGR actual flow. If EGR flow is higher than expected DTC P0402 will set.

Do you know what EGR is ?

Nov 14, 2017 | Cars & Trucks

1 Answer

I have a Ford F-150 xlt 4.6 with a p0401 code.


code p 0401 refers to exhaust gas recirculation (EGR) system---insufficient flow detected==== causes ---hose leak/blockage, basic setting not carried our (if applicable)---wiring---EGR valve ---EGR solenoid ---ECM
when you have done everything make sure that you use a scan tool to reset the ECM
Items that you haven't mentioned are wiring and substituting the ecm with a known operational one
bad wiring and connections / ground , broken in side the insulation may cause the problem as well

Sep 25, 2016 | Ford F-150 Cars & Trucks

1 Answer

Diagnostics code po401 honda passport not shifting


code p 0401 refers to exhaust gas recirculation valve (EGR) system insufficient flow detected ====causes --hose leak/blockage --basic setting not carried out (if applicable)--wiring--EGR valve --EGR solenoid---ECM
has little to do with not shifting unless the leak is affecting the vacuum actuator for the transmission
so check for vacuum leaks in hoses in the engine bay

Jul 16, 2016 | 2001 Honda Passport

1 Answer

What does a po430 code mean on a mercury cougar


EXHAUST RELATED ERROR CODES

There are 711 possible PO generic DTC error codes. Only 7 of the 711 codes are exhaust related.

PO401: Insufficient EGR Flow

PO402: Exhaust Gas Recirculation (EGR) Excessive Flow Detected

PO410: Secondary Air Injection System Malfunction

PO420: Catalyst System Efficiency Below Threshold (Bank 1)

PO421: Warm-Up Catalyst Efficiency Below Threshold (Bank 1)

PO430: Catalyst System Efficiency Below Threshold (Bank 2)

PO431: Warm-Up Catalyst Efficiency Below Threshold (Bank 2)

THINGS TO ASK YOURSELF OR YOUR CUSTOMER

Have there been any driveability or performance issues with the vehicle, have there been any recent repairs or tune-up work performed, if so was the check engine light reset and were the codes recorded on previous repair orders.

Do not rely on scan tool data alone. In most applications, the customer will have the check engine light reset prior to repair. If the original cause of converter failure is intermittent, only the catalyst failure code may show up

Nov 04, 2012 | Cars & Trucks

1 Answer

I have a 2000 buick regal LS with the 3800 series II engine. My service engine soon light came on and it was coded with a bad egr valve. The car was jerking whenever i went up a hill or tried to pass...


What code ? are a few different ones for EGR valve > Low & high circuit voltage , testing circuits , PCM testing etc.... no code tells you to replace the EGR valve without testing . Your best bet , take it to a qualified repair shop.
DTC P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient
DTC P0403 Exhaust Gas Recirculation (EGR) Solenoid Control Circuit
DTC P0404 Exhaust Gas Recirculation (EGR) Open Position Performance
DTC P0405 Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage

Feb 12, 2018 | Cars & Trucks

1 Answer

I have 4 codes: 1- p0401 2- p0401 Pd 3- p0403 4- p0405 what do I have to do to get rid of these codes. what are these and where are they located on a 2004 grand am Thx


p0401
Exhaust gas recirculation-insufficient flow detected
p0403
Exhaust gas recirculation-circuit malfunction
p0405
Exhaust gas recirculation vave position sensor A- circuit low

hope this helps. not sure where they are located

Aug 27, 2010 | 2004 Pontiac Grand Am

1 Answer

Radiator fans fuses keep blowing-chevy impala 2002. we need info on following codes: P0108, P0128, P 0341, P 0401, P 0420, P 1480, and P 1481. John


p0108 map curcuit high input, p0128 coolant temperature below thermstat regulating tempurature, p0341 is camshaft position sensor A-bank 1 ckt range/performance, p0401 is exhaust gas recirculation, insufficiant flow detected, p0420 is catalyst system efficiency below threshold, p1480 is manufacturer control auxilary emission controls, p1481 is same as p1480.

Jun 15, 2010 | 2002 Chevrolet Impala

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