P2289: Injector Control Pressure Too High

P2289 is a plausibility test carried out with the engine stopped. On a HEUI diesel the high-pressure oil pump is driven by the engine, so once it stops, injector control pressure should drop to almost nothing. Ford's 6.0L Power Stroke summaries check this in engine-off mode: if the ICP reading stays above 10 MPa for more than 10 s (2003) or 12 s (2004), P2289 is stored. A real pressure that high without a running pump is unlikely, so the code mainly points to an ICP sensor with an offset or contamination, or to a signal circuit pulled up by a fault that stays within the electrical limits of P2286. Ford's 2014 PCM table marks it as a MIL code. P2288 is the counterpart with the engine running.

Medium severity. Can I keep driving?Drive as little as possible and go to a repair shop. If you smell fuel or the engine is shaking badly, do not keep driving.

Symptoms

MIL on, possibly after the engine was switched off
Hard starting if the PCM trusts the false pressure value

Most likely causes

ICP sensor with a positive offset or oil contamination
Partial short between signal and reference voltage
Faulty input stage in the PCM

What to check, in order

Start with the simplest. You can tick off each step.

Check the connector and wiring of the injector indicated
Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
Measure the resistance and compare it with the manufacturer's specification
Check the control signal with an oscilloscope; on direct injection or diesel engines, leave this to a repair shop because of the high voltages
On diesels, check the per-cylinder injection corrections

Good to know

Repair difficulty: medium
It affects emissions.

What each character of P2289 means

P: Powertrain: engine and transmission
2: Generic code: same on every make
2: Fuel injection
89: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2289?

Drive as little as possible and go to a repair shop. If you smell fuel or the engine is shaking badly, do not keep driving.

What causes code P2289?

The most common causes are: iCP sensor with a positive offset or oil contamination; partial short between signal and reference voltage; faulty input stage in the PCM.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.

P2289: Injector Control Pressure Too High - Engine Off