Question about 1996 Toyota Tercel
P0401 indicates that EGR Flow Insufficient.
But if you have handled it and believe it is okay, I will give you tips on turning the warning off.
Posted on May 27, 2009
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Posted on Jan 02, 2017
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Description of codes are:
P01600 - Serial cable malfunction-- check connection,
Po115-Coolant sensor-indicates a open or short-circuit in the engine coolant temperature sensor circuit.
The P0401 code is Insufficient Flow Exhaust Gas Recirculation System.
The code is set when the engien computer detects less than the requested amount of EGR flow when the engine is hot and is under load.
What usually sets the code is an inoperative EGR valve, or a carbon clogged port under the EGR valve.
On your engine, the EGR valve is vacuum operated, and there is a little computer-controlled EGR solenodi valve in the vacuum hose that detemines how much vacuum the EGR valve gets. If this solenoid is bad, or there is a vacuum leak in one of the hoses, the EGR valve won't open when it should setting the code.
Since the dealer already cleaned the EGR valve tube, I would suspect your problem is likely due to a bad EGR solenoid valve or a leaky vacuum hose to the EGR valve.
Here is the EGR solenoid valve part number and list price:
P/N 3946038750 $40.59
I would clear the codes first and run engine for two min and re-check codes.
Write to me of the findings and we will go from there.
Regards, Lee Davidian
A Four Thumbs up ^^^^
is appreciated for answering your question.
Thank you, Lee
Oct 19, 2010 | 2001 Hyundai XG300
P0401: Exhaust gas recirculation (EGR) system - insufficient flow detected
Causes: Hose leak/blockage, basic setting not carried out (if applicable), wiring, EGR valve, EGR solenoid, ECM
better clean out hoses and valves...
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