P21F4 - Fuel Control System B Too Lean Off Idle Bank 1
P21F4 is a generic powertrain diagnostic trouble code indicating Fuel Control System B Too Lean Off Idle Bank 1. It relates to the Fuel & Air Metering system.
DTC Breakdown (SAE J2012)
| System | Powertrain (P) |
| Type | Generic |
| Subsystem | Fuel & Air Metering |
| Fault Index | F4 |
| Standard | SAE J2012 / ISO 15031-6 |
What does diagnostic code P21F4 mean?
The dtc/">diagnostic trouble code P21F4 represents Fuel Control System B Too Lean Off Idle Bank 1. This standard generic code points to a monitored fault condition in the vehicle's Powertrain network.
Detailed diagnostic guides and specific fix procedures for code P21F4 are currently being compiled. Always verify check engine warnings with a qualified mechanic.
Frequently Asked Questions about P21F4
What does P21F4 mean?
The diagnostic trouble code P21F4 represents Fuel Control System B Too Lean Off Idle Bank 1. This standard generic code points to a monitored fault condition in the vehicle's Powertrain network.
What is the system for P21F4?
The P21F4 code is located in the vehicle's Powertrain network.