Check Engine Light Not working
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1st Gear
Joined: Jan 2025
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Check Engine Light Not working
Hi,
I have a Ford 2008 E350 and the check engine light is not working (it won't turn on at all, not even when starting the van) . Any one know how to troubleshoot the issue? All other lights in the cluster work, except for the check engine light.
From a previous post on here https://www.ford-trucks.com/forums/1...ight-wire.html
The PCM can be programmed to disable the MIL/check engine light? Anyone know how to enable it back?
I tried swapping a different PCM that I bought used from Ebay (VIN was programmed by seller) however Van won't start or crack. Probably got a bad PCM or VIN number was not programmed correctly?
Anyway to test the check engine light on the cluster through the connector pins?
Thanks,
Gabe
I have a Ford 2008 E350 and the check engine light is not working (it won't turn on at all, not even when starting the van) . Any one know how to troubleshoot the issue? All other lights in the cluster work, except for the check engine light.
From a previous post on here https://www.ford-trucks.com/forums/1...ight-wire.html
The PCM can be programmed to disable the MIL/check engine light? Anyone know how to enable it back?
I tried swapping a different PCM that I bought used from Ebay (VIN was programmed by seller) however Van won't start or crack. Probably got a bad PCM or VIN number was not programmed correctly?
Anyway to test the check engine light on the cluster through the connector pins?
Thanks,
Gabe
Mountain Pass
Joined: Mar 2023
Posts: 222
Likes: 54
No...
The schematics do not show any external connection to the CEL.
As mentioned in the referenced post, I also imagine the PCM signals the IC to turn on the CEL via a network connection (likely the CAN bus as the IC has a connection to both the MS CAN bus and the CAN but the PCM only connects to the CAN bus). I don't know if the original "prove out" of the CEL is initiated in the IC or the PCM.
Vendors seem to list a replacement CEL bulb up to 2007 but not after so I'm guessing the CEL is not a normal replaceable bulb.
The schematics do not show any external connection to the CEL.
As mentioned in the referenced post, I also imagine the PCM signals the IC to turn on the CEL via a network connection (likely the CAN bus as the IC has a connection to both the MS CAN bus and the CAN but the PCM only connects to the CAN bus). I don't know if the original "prove out" of the CEL is initiated in the IC or the PCM.
Vendors seem to list a replacement CEL bulb up to 2007 but not after so I'm guessing the CEL is not a normal replaceable bulb.
Hotshot
Joined: Jul 2020
Posts: 10,534
Likes: 2,664
From: Near Salt Lake City
The pinpoint tests for the instrument cluster will walk you through the bulb diagnosis
Cracked solder joints in the cluster come to mind
Yes, there is a way to check the cluster bulb (LED) circuit
A 08 service manual is what you need or AllData
Cluster diagnosis and a no check engine lamp flow chart is what you need
Cracked solder joints in the cluster come to mind
Yes, there is a way to check the cluster bulb (LED) circuit
A 08 service manual is what you need or AllData
Cluster diagnosis and a no check engine lamp flow chart is what you need
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