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2004 Ford Ranger 4.0L Engine Shows P0420, P0113, P0102, P2196, P2198 Codes with Rough Idle and Stumbling on Acceleration

Model: 2004 ranger 4.0 Fault Code: P0102 Posted: 2018-03-13 13:02

My 2004 Ford Ranger 4.0L engine is displaying multiple active OBD-II diagnostic codes: P0420 (Catalyst Efficiency Below Threshold), P0113 (Engine Coolant Temperature Sensor 'A' Too High), P0102 (Manifold Absolute Pressure Sensor Circuit Low Input), P2196 (Fuel Trim 2 Too Rich), and P2198 (Fuel Trim 2 Too Lean). The vehicle runs roughly and stumbles during acceleration. It reaches operating temperature, but the symptoms persist. I'm looking for guidance on diagnosing and resolving these issues without costly repairs.

Related fault codes

P0102P0113P0420P2196P2198

Comments (3)

Anonymous 2018-03-13 13:35

Are you using a K&N oiled air filter? If so, it may be interfering with airflow readings. Consider removing or replacing it. Also, clean the Mass Airflow (MAF) sensor thoroughly and inspect all wiring connections to ensure integrity. Faulty MAF readings can skew engine management system inputs. Are there any additional diagnostic codes present? Specifically, is the Engine Coolant Temperature (ECT) sensor reading within normal operating range?

Anonymous 2018-03-13 14:43

No, I do not use a K&N air filter. The vehicle does reach proper operating temperature. I will proceed with cleaning the MAF sensor and inspecting its wiring harness as suggested.

Anonymous 2018-03-13 14:56

Be sure to check the MAF sensor connector for corrosion, loose connections, or physical damage—wiring issues at the MAF can cause inconsistent readings and trigger multiple fault codes like P0102 and P0113.