P0104 Code: Mass Air Flow (MAF) Circuit Intermittent
Note: We do not currently have verified model-specific diagnostic data for the Dodge Durango. The symptoms and fixes listed below are the standard generic OBD2 guidelines for the P0104 code. Always consult a factory service manual before replacing parts.
What does this mean?
Code P0104 indicates that the Powertrain Control Module (PCM) has detected an intermittent or erratic signal from the Mass Air Flow (MAF) sensor circuit. This means the voltage readings from the MAF sensor, which measures the amount of air entering the engine, are not consistently stable. Instead, they are cutting in and out, or fluctuating unpredictably. This intermittent signal can lead to incorrect fuel mixture calculations, causing symptoms like rough idle, hesitation, stalling, reduced engine power, and poor fuel economy. The PCM relies heavily on the MAF signal for precise engine operation, and an unreliable signal can significantly impact performance and emissions.
How serious is this code?
Driving with an intermittent P0104 code can be unsafe. The erratic MAF signal can lead to unpredictable engine performance, including sudden loss of power, hesitation during acceleration, rough idling, or even stalling, especially at inconvenient times like in traffic or at intersections. This can increase the risk of an accident. While the vehicle might still be drivable, it's advisable to diagnose and repair the issue promptly to restore reliable engine operation and prevent potential safety hazards or further engine damage.
Diagnostic system: Sensor circuit and live data
On a Dodge Durango, the P0104 code should be diagnosed as part of the sensor circuit and live data group. Related codes and live data from this same system can change the repair priority, so avoid replacing parts from the code name alone.
Most Common Causes for Dodge Durango
- Damaged, chafed, or broken wiring harness
- Corroded or loose electrical connector
- Dirty or contaminated MAF sensor
- Faulty Mass Air Flow (MAF) sensor
Symptoms to Watch For
- Check Engine Light is illuminated
- Rough or unstable idle
- Engine surging or fluctuating RPM
- Hesitation or stumble during acceleration
- Engine stalling or dying unexpectedly
Before replacing parts, check these first
- Inspect the connector for corrosion, broken locks, oil intrusion, or heat damage.
- Verify 5V reference, ground, and signal with a multimeter where applicable.
- Compare live sensor data to realistic engine temperature, pressure, airflow, or throttle values.
- Check for blown fuses, weak battery voltage, and damaged connectors before buying major parts.
How to Diagnose
Common Mistakes
Replacing the named sensor without testing power, ground, signal, and wiring continuity first. Always confirm the fault with freeze-frame data, live data, visual inspection, and circuit checks before spending money on parts.
Frequently Asked Questions
Can I drive with the P0104 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0104 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0104 code, your Dodge will automatically fail an OBD2 plug-in emissions or smog test.
What should I check first for P0104?
Inspect the connector for corrosion, broken locks, oil intrusion, or heat damage. Verify 5V reference, ground, and signal with a multimeter where applicable. Compare live sensor data to realistic engine temperature, pressure, airflow, or throttle values.
Join the Discussion
Repair Estimate
Fuse, connector, wiring, cleaning, or basic inspection
Major component replacement after live data and circuit tests confirm failure
Sensor replacement can be moderate cost, but wiring and connector repairs are common and cheaper.
DIY Difficulty
Can usually be performed at home with basic hand tools.