Partially blocked or clogged cylinder 6 injector (deposits or contamination); Poor quality or contaminated fuel causing deposits or a blocked injector filter screen; Low fuel pressure or supply fault affecting delivery (weak pump, clogged fuel filter, faulty regulator), where fitted; Wiring or connector fault at the cylinder 6 injector (high resistance, corrosion, poor pin tension); Intake air leak or vacuum leak near cylinder 6 giving a lean condition that mimics a restriction; Faulty injector with internal electrical or mechanical fault, such as a sticking pintle or weak coil; Fault in the engine control unit injector driver.

P02B0

Cylinder 6 - Injector Restricted.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
2: AreaFuel and air metering (injector circuit)
B0: FaultThe specific fault in that area

What it means

P02B0 is the generic SAE J2012 code for a restricted fuel injector on cylinder 6. The engine control unit has judged that cylinder 6 is receiving less fuel than commanded, typically from fuel trim, misfire or oxygen sensor data for that cylinder or its bank. The exact detection method varies by manufacturer and engine.

Symptoms

Engine management light on
Rough idle or misfire felt mainly on one cylinder
Hesitation or flat spot under acceleration
Reduced power and poorer fuel economy
Hard starting or uneven running when cold
Lean mixture or misfire codes stored alongside

Possible causes

Partially blocked or clogged cylinder 6 injector (deposits or contamination)likely
Poor quality or contaminated fuel causing deposits or a blocked injector filter screenpossible
Low fuel pressure or supply fault affecting delivery (weak pump, clogged fuel filter, faulty regulator), where fittedpossible
Wiring or connector fault at the cylinder 6 injector (high resistance, corrosion, poor pin tension)possible
Intake air leak or vacuum leak near cylinder 6 giving a lean condition that mimics a restrictionpossible
Faulty injector with internal electrical or mechanical fault, such as a sticking pintle or weak coilpossible
Fault in the engine control unit injector driverrare

How to diagnose

Read all stored and pending codes and note freeze frame data, including fuel trims, engine load and temperature when the code set
Check for related codes such as misfire on cylinder 6, lean mixture, or fuel pressure faults, and diagnose those in a sensible order
Inspect the injector connector and wiring for cylinder 6 for damage, corrosion, heat damage and secure fitting
Check live data for fuel trims and misfire counts on cylinder 6 compared with other cylinders
Inspect for intake leaks around the inlet manifold, gaskets and hoses close to cylinder 6
Test fuel pressure and volume against the manufacturer specification for the engine
Measure injector coil resistance and check the injector signal pattern against specification
Swap the cylinder 6 injector with another cylinder if the design allows and see whether the fault follows the injector

How to fix

Clean or replace the restricted cylinder 6 injector, following the manufacturer procedure for the engine
Repair or replace damaged wiring, terminals or connectors at the injector
Replace the fuel filter or repair the fuel supply fault found during pressure testing
Seal any intake air leak found and replace faulty gaskets or hoses
Drain and replace contaminated fuel if testing shows contamination, then clear the code and confirm it does not return

Can I keep driving?

Medium severity

Short, gentle journeys are usually possible, but get it checked soon. A lean or misfiring cylinder can overheat the catalytic converter and may cause engine damage if ignored, so stop driving if the engine runs very roughly or flashes the warning light.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.