5-Pin 1-2141521-1 / 1-1718806-1 Waterproof MAF Air Flow Meter Sensor Connector – 1.2mm

Direct-fit replacement for TE Connectivity part numbers 1-2141521-1 (female) and 1-1718806-1 (male), a 5-pin waterproof 1.2mm pitch connector used for mass air flow (MAF) sensor and air flow meter harness connections. A failed MAF sensor connector is one of the most common causes of MAF-related fault codes – always inspect the connector before replacing the sensor itself.

Key Specifications

• OEM Part Numbers: 1-2141521-1 (female) / 1-1718806-1 (male)
• Pin Count: 5
• Terminal Pitch: 1.2mm
• Wire Gauge: 22 AWG (0.3 mm²)
• Wire Length: 5.5 inches (140 mm)
• Waterproof Rating: IP68
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Current Rating: Up to 3A per pin (signal circuits)

MAF Sensor Pin Assignment (Typical 5-Pin)

Fault Codes Caused by Failed MAF Connector

• P0100 – MAF Circuit Malfunction
• P0101 – MAF Circuit Range/Performance
• P0102 – MAF Circuit Low Input (open circuit at Pin 1 or 3)
• P0103 – MAF Circuit High Input
• P0110–P0113 – IAT sensor circuit faults (shared connector)

Diagnosis Before Replacing the MAF Sensor

1. With ignition ON, measure Pin 1 voltage – should read 12V. No voltage indicates a wiring or fuse fault upstream.
2. Measure Pin 2 resistance to chassis ground – should read less than 0.5Ω. High resistance indicates a ground circuit fault.
3. Wiggle the connector while monitoring MAF reading on a scan tool – any dropout during wiggling confirms a connector fault, not sensor failure.
4. Inspect connector for green corrosion, bent 1.2mm pins, or cracked housing.

Frequently Asked Questions

Q: What is the difference between 1-2141521-1 and 1-1718806-1?
A: 1-2141521-1 is the female socket housing (sensor side); 1-1718806-1 is the male plug housing (harness side). For a complete repair, you typically need the female socket (1-2141521-1) which connects directly to the MAF sensor body.

Q: Can a dirty MAF sensor cause the same codes as a bad connector?
A: Yes. P0101 (range/performance) is commonly caused by a contaminated MAF sensor. P0102 (low input) is more commonly caused by an open circuit – inspect the connector first. Clean the MAF sensor with MAF cleaner spray before replacing either the sensor or connector.

Q: What crimping tool is needed for 1.2mm terminals?
A: Use a precision micro-crimper rated for 0.3mm² (22 AWG) – Engineer PA-09 or TE Connectivity 91516-1. Standard automotive crimpers will crush the 1.2mm terminal barrel.

Package Contents

1 × 5-Pin Female Connector (1-2141521-1) with 22 AWG wire, rubber wire seals, and terminal insert