Applicable Systems
F-150
Mustang
Explorer
Focus
Edge
Escape
Fusion
Ranger
Symptoms
The ECM has detected a air flow and manifold pressure condition. The check engine light is on. Fuel economy may be affected.
Possible Causes
- Actuator mechanical failure
- Fuse blown for the circuit
- ECM/PCM software glitch or corruption
Troubleshooting Steps
- Step 1: Connect OBD-II scan tool and read all active DTCs
DTC code and freeze frame data retrieved - Step 2: Inspect wiring harness and connectors for damage or corrosion
Wiring intact, connectors clean and seated - Step 3: Test sensor or actuator resistance and signal output
Component output within manufacturer specification - Step 4: Check fuse for the circuit and replace if blown
Fuse intact or replaced with correct rating - Step 5: Clear DTC with scan tool and road test to verify repair
No re-occurrence of DTC after test drive
How to Reset
To reset: Clear the DTC with an OBD-II scan tool after repair. Confirm with a drive cycle.
Frequently Asked Questions
- Q: Is P2221 a serious code?
It is a moderate-severity manufacturer-specific code. The vehicle can be driven but should be serviced soon.
Source: SAE J2012 Manufacturer-Specific DTC, Ford Service Manual
Category: OBD-II