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P2289 is a diagnostic trouble code (DTC) for "Injector Control Press Too High-Engine Off". 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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
Injector Control Press Too High-Engine Off
P2289 is an OBD-II code for the engine control module (ECM) detecting the injector control pressure (ICP) sensor is registering a fuel pressure that is above specifications with the engine off.
The ICP sensor or the FRP (Fuel Rail Pressure) sensor is not biased correctly and reading incorrect pressures.
The ICP sensor is registering the engine off fuel pressure above specified fuel pressure range.
There is a defective FRP sensor detecting higher than normal pressures
The Check Engine Light will be illuminated and the code will set in the ECM memory as a fault.
The engine may run normal if the pressures are normal and rich if the pressure is too high.
The engine may run rich if the fuel pressures are above specified range.
Scans for codes and documents the code in the ECM, and looks at the freeze frame data for failure
Follows the manufacture pinpoint test procedures and specifications for checking fuel pressures
Follows the manufacture pinpoint testing for the ICP code received
Checks fuel pressure at specified engine RPM levels and compares it to specifications using a gauge
Compares test readings with a gauge to the sensor readings for the ICP and FRP
Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired
Failing to follow the manufacturer pinpoint tests for the application
Replacing the ICP, assuming the part is the failure without verification
Code P2289 indicates the engine ECM is detecting the ICP not getting a normal fuel pressure when the engine is off, and that the pressure is too high above specifications. This can lead to injectors leaking after the engine is off and flooding the engine with fuel.
Repairing the wiring or connection to the ICP or FRP signal return if there is an abnormal reading caused from corrosion in the connections
Replacing the ECM
Code P2289 is most commonly caused by a biased ICP internally, or a FRP signal biased differently causing a disparity between the two readings. The fuel pressure testing will show which one of the two is not registering correct pressures.
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