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P2291 is a diagnostic trouble code (DTC) for "Injector Control Pressure Too Low - Engine Cranking". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
Injector Control Pressure Too Low - Engine Cranking
This trouble code will only be found on diesel powered vehicles. It indicates that the injector control pressure for the high pressure oil has fallen below the threshold of acceptance set by the manufacturer during the cranking of the engine.
Some potential causes of this trouble code would include:
Symptoms of this trouble code that the driver may experience would include:
A Check Engine Light may be illuminated
If the engine runs with this code stored for an extended period of time, severe engine damage may also be a symptom associated with this trouble code
A mechanic may begin to diagnose this trouble code by first checking the oil level and condition. If the oil level is low or extremely dirty, this issue may have been caused by that. If the oil seems to be okay, the mechanic would then test the injector pressure control sensor and the oil injector control regulator for proper function using the manufacturer’s recommended procedure. During these tests, the mechanic would also ensure that all the wiring and connectors associated with this system are in good working condition. Finally, the mechanic would test the powertrain control module and relay their findings over to the customer to help make a repair decision.
A common mistake that could be made when diagnosing this trouble code would be assuming that is not a big deal, and driving the vehicle with the code stored for a period of time. This is not a code that can be put on the back burner as it can cause serious engine damage.
This code would be considered very serious as it can cause major engine damage if stored in the powertrain control module for an extended period of time. It is not a good idea to drive a vehicle with this trouble code stored other than to drive it to a place to get this issue resolved.
Repairs that could potentially resolve this issue would be:
Keeping up on basic vehicle maintenance can help to prevent trouble codes such as this one. Each manufacturer of diesel engines will specify an oil change interval that should be strictly followed. This information can be found in your owner’s manual. The typical diesel interval is between five and ten thousand miles.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230