P021F OBD-II: Cylinder 12 Injection Timing

P021F Severity

Urgent

Should you fix P021F yourself?

Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.

Proper diagnosis will save you time and money on unnecessary repairs.

Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.

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P021F Summary Find a Repair Shop P021F Details Ask RepairPal CarGenius Other OBD-II Codes

What causes OBD-II fault code P021F?

The engine control module (PCM) has special transistors called "drivers" to turn the Fuel Injectors on and off in the Fuel Injection System. If the PCM cannot control the fuel injector, it will set code P021F.

OBD II Fault Code

OBD II P021F

OBD-II Code Decreased engine performance is defined as a Cylinder 12 Injection Timing

Decreased engine performance Symptoms

Decreased engine performance
Increased fuel consumption

Common Problems That Trigger the P021F Code

Fuel injector failure
Powertrain Control Module (PCM) failure
Wiring issue

Common Repairs Needed for the P021F Code

Fuel Injector Replacement (Diesel)

OBD Code Resources

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OBD II Fault Code

OBD II P021F

OBD-II Code Decreased engine performance is defined as a Cylinder 12 Injection Timing

Decreased engine performance Symptoms

Decreased engine performance
Increased fuel consumption

Common Problems That Trigger the P021F Code

Fuel injector failure
Powertrain Control Module (PCM) failure
Wiring issue

Common Repairs Needed for the P021F Code

Fuel Injector Replacement (Diesel)

P021F OBD-II: Cylinder 12 Injection Timing

Should you fix P021F yourself?

What causes OBD-II fault code P021F?

Need a P021F diagnosis? Trust our experts.

OBD II Fault Code

Decreased engine performance Symptoms

Common Problems That Trigger the P021F Code

Common Repairs Needed for the P021F Code

OBD Code Resources

Need a P021F diagnosis? Trust our experts.

Ask our experts about P021F.

Other OBD-II Codes

OBD II Fault Code

Decreased engine performance Symptoms

Common Problems That Trigger the P021F Code

Common Repairs Needed for the P021F Code