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P0104

Overview

Code

P0104

Code Type

P

Code Class

P0

System

Engine

Severity Level

Medium

Emissions Related

true

Drivability Impact

Major

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0104 indicates an intermittent or erratic signal from the mass air flow (MAF) sensor circuit

Symptoms

Intermittent Check Engine Light; Hesitation or surging; Engine stalling; Unstable idle

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Intermittent MAF signals can disrupt engine load calculations and cause inconsistent engine behavior

Possible Causes

Loose or damaged wiring/connectors; Failing MAF sensor; Vibration-related electrical faults; Intake air leaks

Diagnostic Steps

1 Scan for additional intermittent codes; 2 Inspect MAF wiring for looseness or corrosion; 3 Wiggle-test connectors while monitoring live data; 4 Inspect intake system for leaks; 5 Replace the MAF sensor if intermittent faults persist

Drive Safety Notes

Driving may be possible, but intermittent stalling or hesitation can pose safety risks Repair is recommended promptly

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