Codes stored but no CEL on?
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Elder User
Joined: Feb 2004
Posts: 830
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From: Indiana
Codes stored but no CEL on?
I have run into something I don't fully understand. Our ford van has been running bad for a little bit now. I have checked for codes and there were none when it first started running bad. In the last few weeks it had gotten worse. I went out and it had codes pending and in the history but the check engine light was not on.
I thought that after the same code had occured twice within a certain time frame that the CEL would come on? It is a 2000 windstar and the codes were P1100 and P1121. Basicily a Mass air flow problem.
Am I missing something here? Any thoughts?
I thought that after the same code had occured twice within a certain time frame that the CEL would come on? It is a 2000 windstar and the codes were P1100 and P1121. Basicily a Mass air flow problem.
Am I missing something here? Any thoughts?
Fleet Mechanic
Joined: Aug 2007
Posts: 1,828
Likes: 253
From: Piney Woods of East Texas
If the engine did not get in closed loop state, some codes are not passed on. They are dependent on ready state.
Did you replace or clean the mass flow sensor? Will make a engine run bad.
Did you replace or clean the mass flow sensor? Will make a engine run bad.
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Elder User
Joined: Feb 2004
Posts: 830
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From: Indiana
The engine was in closed loop when the codes were set. I have an Autotap system and retrieved the freeze frame data.
Tried to spray it down with electrical cleaner as good as I could but it didn't help. Have ordered another one but it won't arrive until Wed. Hopefully after it is replaced no more problems.
Just thought it was strange that the CEL was not on.
Tried to spray it down with electrical cleaner as good as I could but it didn't help. Have ordered another one but it won't arrive until Wed. Hopefully after it is replaced no more problems.
Just thought it was strange that the CEL was not on.
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