My c1500 5.7L has no fuel supply, autozone tested, bad OX sensor
My 1997 service light came on autozone tested the code and said it was a bad OX sensor. It would shut off but I could start it with starter fluid in the port. Now will not start. Is there a sensor that shuts off the fuel supply.
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Only 1 code (p1401) means EGR Temperature Sensor problem. Bad Sensor or EGR valve may need to be replaced. Autozone has some ways to test your sensor and egr valve. If you do have a bad sensor it is about $170 average. If you have a bad EGR valve it is about $150 average. Hope this helps!!! Let me know if it does! -Kevin from KCG InnovationsAuto specialist
sounds like a bad catalytic converter, just did my 1985 Jeep could not get it to pass ended up replacing the catalytic converter, muffler, ox sensor and EGR valve then Jeep passed with flying colors. if your cat is bad it reduces your exhaust flow causing loss of power and increases fuel consumption.
Check plugs see what they look like a lean mixture will look light in color ,compare to the other bank. They need to look all similar,detect a lean fireing cylinder or cylinders on one bank, Could be fuel delivery,from an injector ! Or leaking intake manifold gaskets or bad hoses,leaking vacummn.
Most likely and commonly, you have a bad sensor. Possibly leaky vacuum line. But most likely a sensor. You can test any sensor with an ohmmeter. You can test any relays with an ohmmeter as well. Fuel pump relay, Cranks Shaft Position Sensor, Camshaft sensor (if applicable) Throttle position sensor
There are others that you could test if you want, but those are the most common. If your check engine light is on, then a bad sensor or circuit is definately the problem. A clogged fuel filter could also give you problems like your having.
An engine diagnostic or code scan would be most helpful. Most part stores will do it for free as long as the check/service engine light is on. You can go to autozone.com and register for free online repair manual for your car.
most any sensor going bad can cause the check engine light to come on,try disconnecting the posative battery cable for 15 seconds ,then put it back on,will reset the codes, or take it to auto zone,they will test your computer for codes at no charge to you.i had a venture van my was ox. sensor. thanks robert b.
ok , unplugged ox sensor cause engine light is on , then check the air filter and fuel filter for dirty and replace,connect the ox sensor, then disconnect the negative battery terminal few minutes, reconnect and test
Here is a list of possible causes, hope this helps.
Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with one of the components or sensors it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you need to diagnosed and repaired it. The list of possible codes number in the hundreds. The code itself doesn't tell exactly what component is defective - it only indicates where to look, or what engine parameter is out of normal range. You or a technician will have to perform further testing to pinpoint cause and the proper repair. Even if you reset the light, if the underlying problem is not addressed it will come back on.
Air leaks after the MAF sensor, or leaks in the PCV system
Vehicle running out of fuel or engine oil dip stick not seated
EGR valve gasket is damaged or leaking around the gasket
Exhaust leaks before or near where the HO2S is mounted
Fuel injector(s) not supplying enough fuel
Fuel system not supplying enough fuel during high fuel demand conditions (e.g., the fuel pump may not supply enough fuel)
MAF sensor is dirty (can cause PCM to underestimate airflow)