Improperly seating your engine oil dipstick could also result in this error code. An air leak after your mass air flow sensor or a leaking gasket in your EGR system could be the cause. Carefully inspect your fuel system to find any damaged or contaminated components that would cause an imbalance of fuel and air.Ī range of minor issues throughout the other systems could also be the cause of this trouble code. Leaking fuel injectors, low fuel, or too much fuel pressure could all result in this trouble code. The next system to check is your fuel system. Any other these would result in an incorrect HO2S reading and trouble code P1151.
Your powertrain control module or HO2S could be damaged, wiring connectors could be loose, or there could be water in the harness connector. Typical Causesįirst, inspect your electrical system to determine if there’s an issue. This sensor being triggered could be the result of a much more serious issue with your engine, fuel system, or induction system, so it’s important to look for the cause and find a solution. You’ll simply see your Check Engine light illuminated.Ī lack of symptoms doesn’t mean that you can ignore trouble code P1151. However, the issue is typical an electrical issue in one or more of these systems, so you’re unlikely to notice any performance issues. Because of the many interrelated parts, you’ll need to check your electrical, induction system, PCV system, base engine, EGR system, and fuel system for a potential cause. The unique issue with your P1151 problem is that it could be caused by a wide range of issues. For many cases, it’s simply a sign of an electrical issue with your HO2S or powertrain control module.
However, it also could be a sign of too much fuel being injected. This could be the result of improper air intake. A failed test means there isn’t enough air mixing with your fuel. This sensor is used to test the amount of oxygen to ensure an accurate air/fuel ratio. This trouble code is signaled by your heated exhaust oxygen sensor, or HO2S.
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