P0289
Cylinder 10 Injector Circuit High
The appearance of the standard OBD2 trouble fault code P0289 is an indicator that your vehicle ECU triggered a threshold alert for "Cylinder 10 Injector Circuit High". Understanding the root component breakdown helps avoid expensive diagnostic fees.
Driver's Summary
Storing code P0289 is your car's way of telling you something is wrong with the cylinder 10 injector circuit high. Drivers typically experience rough idle, severe hesitation, check engine light when this code is active. This condition is classified as high severity. Prompt diagnosis is essential to prevent cascading damage to related components.
Symptoms
Rough idle, severe hesitation, check engine light
Common Causes
- Short to voltage in Cyl 10 circuit
- Failed injector coil internally
- Damaged connector plug
- Bad PCM
How to Fix
- 1 Trace and fix short to power
- 2 Replace Cyl 10 injector
- 3 Replace connector pigtail
- 4 Test PCM
Technical Explanation
Detection of P0289 occurs when the ECM cross-references multiple sensor inputs and determines that the reported values are physically inconsistent or out-of-range. Misfire rate is counted per cylinder over rolling windows and compared against two thresholds: a catalyst-damaging rate (triggers flashing MIL) and an emissions-exceeding rate (triggers solid MIL). The PCM logs which cylinder is misfiring based on crankshaft position at the time of each detected event. The fault remains stored in memory even after the MIL is cleared; it becomes a confirmed DTC after failing two consecutive drive cycles, and the PCM logs a freeze frame record of the engine's exact operating state at the moment of detection.
Is It Safe to Drive?
An active P0289 code under high-severity conditions means the affected system is operating outside safe parameters. Continued driving — especially under load or at highway speeds — significantly increases the risk of secondary damage to components like failed injector coil internally.
Mechanic's Pro Tip
Before replacing any component on P0289, spend 5 minutes inspecting the wiring harness and connector first — corrosion, chafed insulation, and backed-out pins cause the majority of these faults and cost nothing to fix. Use a multimeter to measure voltage drop across the connector pins under load; anything above 0.1V indicates excessive resistance that will cause intermittent failures even after replacing the sensor.
Related Fault Codes
Frequently Asked Questions
What does OBD2 code P0289 mean?
OBD2 code P0289 refers to Cylinder 10 Injector Circuit High. The appearance of the standard OBD2 trouble fault code P0289 is an indicator that your vehicle ECU triggered a threshold alert for "Cylinder 10 Injector Circuit High". Understanding the root component breakdown helps avoid expensive diagnostic fees.
What are the most common symptoms of DTC P0289?
Drivers experiencing code P0289 typically report: Rough idle, severe hesitation, check engine light.
Is it safe to drive with trouble code P0289 active?
An active P0289 code under high-severity conditions means the affected system is operating outside safe parameters. Continued driving — especially under load or at highway speeds — significantly increases the risk of secondary damage to components like failed injector coil internally.
How much does it cost to fix code P0289?
The estimated repair cost for P0289 ranges from $150 to $500 USD. Injector: 200 - 500
Injector: 200 - 500
Need Professional Diagnostic Assistance?
Always verify sensor signals and wiring integrity with an OBD2 scanner before purchasing replacement parts.
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