The check engine light came on. It was the valve that needed replacing, I REPLACED IT RESET THE CODE BUT THE LIGHT CAME BACK ON. WHAT ELSE COULD IT BE?

30

Asked by Feb 15, 2017 at 06:15 PM about the 2000 Toyota Camry CE

Question type: Maintenance & Repair

tHE VALVE WAS REPLACED WHICH SHOULD HAVE TURNED OF THE
CHECK ENGINE LIGHT BUT THE LIGHT IS STILL ON

10 Answers

69,385

What trouble code do you have? -Jim

73,055

What is the code? Can't help without the code.

1 of 1 people found this helpful.
30

Okay, I will get the code. Thanks

2 of 2 people found this helpful.
1,930

Also....it might help to know which valve was replaced.

1 of 1 people found this helpful.
30

code PO401 SYSTEM INSUFFICIENT FLOW DETECTED. I REPLACED THE VACUUM SWITCHING VALVE.

1 of 1 people found this helpful.
30

THE EGR

1 of 1 people found this helpful.
73,055

P0401 TOYOTA - Exhaust Gas Recirculation Flow Insufficient Detected...Possible causes; EGR passage clogged, Faulty EGR Vacuum Modulator Valve, Faulty EGR Valve, Faulty EGR solenoid valve, EGR solenoid valve harness is open or shorted, EGR solenoid valve circuit poor electrical connection, Dead (Weak) battery, Faulty EGR temperature sensor and circuit, Exhaust gas leaks...EGR flow malfunction could be caused by a clogged EGR valve or EGR tube. Before replacing any parts try cleaning the EGR valve, tube and passages.

1 of 1 people found this helpful.
69,385

Remove the vacuum hose from the EGR valve. Using a hand held vacuum pump apply vacuum to the EGR valve with the engine running at idle. The engine SHOULD stall. If not, either the EGR valve is not opening or the EGR passages are clogged. HTH. -Jim

1,930

Tayfree....did you ever resolve the issue with this vehicle?

30

Hi ,yes I did, it was the modulator. I changed ever thing in the air intake system and the code kept coming on. the modulator was used so I had to buy a new one. thanks for asking

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