Problem with EVAP
#1
10-10-2011, 05:51 AM
Join Date: Oct 2011
Location: Moscow, Russia
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Problem with EVAP
Code P1494.
Problem with LDP (LEAK DETECT PUMP) or something else?
First of all remove EVAP solenoid and clean it hardly by WD-40:
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In 2 days P1494 appears again...All harness OK.
Problem with LDP only or it may be with solenoid again and something else? How to fix this problem? By replace the LDP? Can i repair it?
Problem with LDP (LEAK DETECT PUMP) or something else?
First of all remove EVAP solenoid and clean it hardly by WD-40:
------------------
------------------
In 2 days P1494 appears again...All harness OK.
Problem with LDP only or it may be with solenoid again and something else? How to fix this problem? By replace the LDP? Can i repair it?
#2
10-10-2011, 05:37 PM
P1494-LEAK DETECTION PUMP SW OR MECHANICAL FAULT
There is a leak detection pump for the fuel system. There is a switch in the pump to tell when the system has a vacuum or not. This code means that it actuates the purge solinoid and never see a change in the switch state of the LDP. So either your solinoid doesn't work, you have a gigantic leak in the system or the switch in the LDP is stuck. I have seen all 3, would lean toward the second or third option.
There is a leak detection pump for the fuel system. There is a switch in the pump to tell when the system has a vacuum or not. This code means that it actuates the purge solinoid and never see a change in the switch state of the LDP. So either your solinoid doesn't work, you have a gigantic leak in the system or the switch in the LDP is stuck. I have seen all 3, would lean toward the second or third option.
#3
10-13-2011, 06:41 AM
Join Date: Oct 2011
Location: Moscow, Russia
Posts: 12
Likes: 0
Received 0 Likes
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P1494-LEAK DETECTION PUMP SW OR MECHANICAL FAULT
There is a leak detection pump for the fuel system. There is a switch in the pump to tell when the system has a vacuum or not. This code means that it actuates the purge solinoid and never see a change in the switch state of the LDP. So either your solinoid doesn't work, you have a gigantic leak in the system or the switch in the LDP is stuck. I have seen all 3, would lean toward the second or third option.
There is a leak detection pump for the fuel system. There is a switch in the pump to tell when the system has a vacuum or not. This code means that it actuates the purge solinoid and never see a change in the switch state of the LDP. So either your solinoid doesn't work, you have a gigantic leak in the system or the switch in the LDP is stuck. I have seen all 3, would lean toward the second or third option.
If I had a leak in EVAP system, I whould get code P0442 or P0455.
BCM gives me only P1494...
It seems my problem in LDP switch. Clean it or replace the LDP?
#4
10-13-2011, 10:46 AM
#5
10-13-2011, 10:54 AM
