1997 F1504.6L "W" P1151 OBD2 Code
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Welcome to the forum
A P1151 means that the front O2 sensor on the driver's side is reading lean and the PCM can't add enough extra gas to correct for it.
Does the truck run well? Does it idle rough or misfire or anything like that?
A vacuum leak can cause the problem but usually you'll have rough running if that's the case.
A misfire in one of the cylinders on the driver's side can also cause it but usually you'll get a code for that too.
If it runs well it's probably safe to replace the O2 sensor.
The best way to diagnose it would to watch the live data from the sensors on a scan tool capable of doing that and see what shows up.
A P1151 means that the front O2 sensor on the driver's side is reading lean and the PCM can't add enough extra gas to correct for it.
Does the truck run well? Does it idle rough or misfire or anything like that?
A vacuum leak can cause the problem but usually you'll have rough running if that's the case.
A misfire in one of the cylinders on the driver's side can also cause it but usually you'll get a code for that too.
If it runs well it's probably safe to replace the O2 sensor.
The best way to diagnose it would to watch the live data from the sensors on a scan tool capable of doing that and see what shows up.
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