What Does P0290 Mean?
Cylinder 10 is not contributing its fair share of power during combustion, creating an imbalance in the engine's crankshaft rotational speed. This is detected by comparing crankshaft acceleration signatures between firing events across all cylinders. The driver may notice rough running, vibration, or reduced power, particularly on large diesel engines (V10/inline-6 with 10+ cylinders) where this cylinder exists.
Common Causes
35%
Faulty or worn fuel injector on cylinder 10 delivering incorrect fuel quantity
25%
Low compression on cylinder 10 due to worn piston rings, scored cylinder wall, or valve sealing issue
20%
High-pressure fuel supply issue causing inadequate rail pressure at cylinder 10
12%
Injector wiring harness damage or poor electrical connection at cylinder 10
8%
Glow plug failure (diesel) or ignition component failure affecting combustion quality
Diagnostic Steps
1
Monitor cylinder contribution/balance data via Mode 06 test results; compare cylinder 10 deviation against the manufacturer's threshold (typically ±5% of mean).
2
Perform a relative compression test using cranking RPM analysis to check cylinder 10 mechanical integrity against other cylinders.
3
Check injector fuel delivery by swapping cylinder 10 injector with an adjacent known-good cylinder; clear codes and retest to see if the fault follows the injector.
4
Measure fuel injector resistance on cylinder 10 (typical spec 0.5-1.2 ohms for piezo, 12-16 ohms for solenoid); compare with manufacturer specification.
5
Inspect cylinder 10 injector connector for corrosion, backed-out pins, or chafed wiring; measure voltage and ground at the injector harness with key on.
Estimated Repair Cost
$200 - $1,800
Parts + labor, varies by vehicle and location
Cylinder 10 is not contributing its fair share of power during combustion, creating an imbalance in the engine's crankshaft rotational speed. This is detected by comparing crankshaft acceleration signatures between firing events across all cylinders. The driver may notice rough running, vibration, o...
The most common cause of P0290 (Cylinder 10 Contribution/Balance Fault) is: Faulty or worn fuel injector on cylinder 10 delivering incorrect fuel quantity
Typical repair costs for P0290 range from $200 to $1,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle can generally be driven short distances, but continued operation with a cylinder imbalance increases stress on the crankshaft, bearings, and catalytic converter. Prolonged driving may cause secondary damage. Reduce load and have the vehicle inspected promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0290 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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