What Does P0289 Mean?
The ECM has detected an excessively high voltage or current in the cylinder 10 fuel injector circuit. This code applies to V10 and V12 engines where the cylinder 10 injector driver circuit is reading above the expected electrical parameters. This could be caused by a shorted injector, wiring fault, or ECM driver malfunction. The driver may notice rough running, smoke, or engine knock from overfueling on cylinder 10.
Common Causes
35%
Short to battery voltage in the cylinder 10 injector wiring harness
30%
Cylinder 10 fuel injector with internal short circuit (low coil resistance)
15%
Corroded or damaged connector at the cylinder 10 injector
12%
ECM injector driver transistor failure for the cylinder 10 output
8%
Wiring harness degradation from heat or mechanical abrasion near cylinder 10
Diagnostic Steps
1
Measure cylinder 10 injector coil resistance at the connector — compare to manufacturer specification. V10/V12 diesel injectors have tight resistance tolerances; any reading outside spec warrants replacement.
2
Disconnect the cylinder 10 injector and test the harness for shorts — check from each harness pin to battery positive and to chassis ground. Any continuity indicates a wiring fault.
3
Visually inspect the cylinder 10 injector connector and wiring path — on V10/V12 engines, rear-bank cylinder wiring is prone to heat damage from proximity to exhaust components and turbos.
4
Capture the cylinder 10 injector current waveform with an oscilloscope and current clamp — compare the waveform shape, peak current, and timing to adjacent cylinders.
5
Swap the cylinder 10 injector with an adjacent cylinder, clear codes, and run — if the high circuit code follows the injector, confirm the injector has an internal fault.
6
If wiring and injector test within spec, suspect the ECM injector driver — check for technical service bulletins related to ECM driver failures for the specific engine platform.
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
The ECM has detected an excessively high voltage or current in the cylinder 10 fuel injector circuit. This code applies to V10 and V12 engines where the cylinder 10 injector driver circuit is reading above the expected electrical parameters. This could be caused by a shorted injector, wiring fault, ...
The most common cause of P0289 (Cylinder 10 Injector Circuit High) is: Short to battery voltage in the cylinder 10 injector wiring harness
Typical repair costs for P0289 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Overfueling from a shorted injector circuit can cause engine knock, turbo damage, and catalytic converter overheating. Avoid heavy loads and sustained high-RPM driving. Have it diagnosed and repaired by a qualified technician familiar with the specific V10/V12 platform.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0289 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Generic (SAE)
Recommended Tools
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