diagnostic code Q,s
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Joined: Nov 2001
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From: beverly, Ohio
diagnostic code Q,s
I did the KOER test on my 90 f-150 today and got these three codes- 25-33-41. I,m new to fuel injection so I need all the help I can get. Hopefully someone can point me in the right direction to fix this.
thanks,
scott
thanks,
scott
Posting Guru
Joined: Jan 2003
Posts: 1,061
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From: Still under the hood in O
diagnostic code Q,s
25=Knock sensor not detected, check the connection. This may be the cause of all the codes.
33=EGR Valve Position Sensor Circuit, EGR Valve Opening Not Detected (Engine Running & Continuous Memory)
Ford MCU System Key On Engine Running (KOER) Self-Test Not Initiated - Could be related to the actual problem, it may go away after the right sensor is replaced (see below).
41=Oxygen Reads Lean - check for a vacuum leak
I would buy a Haynes munual if you haven't already. They are the best for testing individual sensors.
Click
HERE for a decent rundown on some of the sensors.
What are the symptoms?
33=EGR Valve Position Sensor Circuit, EGR Valve Opening Not Detected (Engine Running & Continuous Memory)
Ford MCU System Key On Engine Running (KOER) Self-Test Not Initiated - Could be related to the actual problem, it may go away after the right sensor is replaced (see below).
41=Oxygen Reads Lean - check for a vacuum leak
I would buy a Haynes munual if you haven't already. They are the best for testing individual sensors.
Click
HERE for a decent rundown on some of the sensors.
What are the symptoms?
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