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Ford Transit-350 Engine Crankshaft Position Sensor Connectors
Ford Transit-350 Engine crankshaft position sensor connectors
Starting at $34.95, AutoBuffy stocks 4 engine crankshaft position sensor connectors from Motorcraft and Standard Ignition for the Ford Transit-350. This connector is the wiring interface between the crankshaft position sensor and the ECU, transmitting the signal that controls ignition timing and fuel injection. A damaged or corroded connector breaks that signal path, causing hard starts, misfires, or a no-start condition.
Signs your Ford Transit-350 needs a new crankshaft position sensor connector
- Check Engine light with stored codes P0335, P0336, P0337, P0338, or P0339 pointing to CKP sensor circuit faults
- Engine cranks but refuses to start because the ECU has no crank signal to trigger spark and injection
- Random stalling at idle or low speed when connector flex or heat causes an intermittent open circuit
- Noticeable hesitation or stumble under acceleration as the signal drops out briefly during connector movement
- Rough idle or misfires that appear or disappear when you wiggle the wiring harness near the sensor
- Failed emissions test or readiness monitor that will not complete due to an unresolved CKP circuit fault
Which crankshaft position sensor connector should you buy for your Ford Transit-350?
The main decision is whether to buy a bare pigtail connector, a pre-terminated connector with wire leads already attached, or a complete connector-and-sensor kit. Match the connector body style, pin count, and wire gauge to the original plug on your Ford Transit-350 to ensure a waterproof, secure fit. OE-spec terminal plating and weatherproof seals matter here because the connector lives near the crankshaft in a hot, oily environment.
OEM-equivalent pigtail with leads
Best for
Most DIYers replacing a damaged connector end
What you get
Factory-matched plug body, pre-installed terminals, and 6–12 in. of wire for a clean splice
Bare connector housing only
Best for
Shops reusing good existing wire leads and terminals
What you get
Replacement housing and terminal locks; requires transferring or crimping your own pins
Weatherproof upgrade connector
Best for
High-heat or high-mileage vehicles prone to corrosion
What you get
Silicone-sealed body and gold-plated or tin-plated terminals for improved moisture resistance
Sensor-and-connector combo kit
Best for
Replacing both sensor and connector at the same time
What you get
Matched sensor and pigtail in one box, eliminates compatibility guesswork and saves a second labor visit
| Option | Best for | What you get |
|---|---|---|
| OEM-equivalent pigtail with leads | Most DIYers replacing a damaged connector end | Factory-matched plug body, pre-installed terminals, and 6–12 in. of wire for a clean splice |
| Bare connector housing only | Shops reusing good existing wire leads and terminals | Replacement housing and terminal locks; requires transferring or crimping your own pins |
| Weatherproof upgrade connector | High-heat or high-mileage vehicles prone to corrosion | Silicone-sealed body and gold-plated or tin-plated terminals for improved moisture resistance |
| Sensor-and-connector combo kit | Replacing both sensor and connector at the same time | Matched sensor and pigtail in one box, eliminates compatibility guesswork and saves a second labor visit |
Engine crankshaft position sensor connectors brands we stock for your Ford Transit-350
Motorcraft
3 options · from $61.95
Standard Ignition
1 option · from $34.95
Replacing a crankshaft position sensor connector on a Ford Transit-350
Moderate⏱ 30–90 minutesTerminal pick or connector release toolWire stripper and ratcheting crimperMultimeter for circuit verificationOBD-II scan tool for code clearingElectrical contact cleaner and dielectric grease
Disconnect the battery before starting, then depress the locking tab and separate the old connector from the sensor. If using a pigtail, cut the damaged connector from the harness leaving enough wire to splice, then strip, crimp, and heat-shrink each lead to the new pigtail one wire at a time to avoid mix-ups. Apply a small amount of dielectric grease to the terminals, snap the connector onto the sensor until it clicks, reconnect the battery, and clear any stored fault codes before test-driving.
Frequently asked questions
How much does it cost to replace crankshaft position sensor connectors on a Ford Transit-350?
The connector itself starts at $34.95 on AutoBuffy. Add shop labor of roughly 30–60 minutes for connector replacement alone, or up to an hour if the sensor is replaced at the same time. Doing it yourself keeps total cost close to the part price, making this one of the more affordable electrical repairs on the Ford Transit-350.
Can a bad crankshaft position sensor connector cause a no-start on a Ford Transit-350?
Yes. The ECU relies on a continuous crank signal to authorize spark and fuel injection. A broken, corroded, or backed-out terminal in the connector interrupts that signal entirely. The engine will crank normally but not fire. Swapping the connector before replacing the sensor itself is a low-cost first diagnostic step.
How do I know if the connector is the problem and not the sensor itself on my Ford Transit-350?
Inspect the connector for melted plastic, spread or corroded terminals, broken locking tabs, and frayed wire insulation right at the plug. Back-probe the connector with a multimeter while wiggling it — a fluctuating or absent reference voltage or ground confirms a connector fault. If voltage is steady at the connector but the sensor code persists, the sensor itself is likely faulty.
Is it safe to drive a Ford Transit-350 with a faulty crankshaft position sensor connector?
No. An intermittent connector can cause sudden stalling at highway speed without warning, creating a real safety hazard. It also leaves the engine vulnerable to running conditions the ECU cannot properly control. Drive only as necessary to reach a repair facility, and avoid high-traffic or high-speed roads until the connector is replaced.
Do I need to reprogram or reset anything after replacing the crankshaft position sensor connector on a Ford Transit-350?
The connector swap itself requires no programming. However, some Ford vehicles require a crankshaft position system variation relearn procedure after the circuit is restored, particularly if the ECU lost its learned pattern. Clear any stored codes after the repair and check whether your Transit-350 specifies a relearn before returning the vehicle to normal use.
What causes crankshaft position sensor connectors to fail on the Ford Transit-350?
Heat cycling near the engine block causes the plastic housing to become brittle and crack over time. Oil and coolant contamination corrodes terminals and degrades the weatherproof seal. Repeated flexing of the harness — from engine movement or improper routing — fatigues the wire leads at the connector body, eventually causing an open circuit.