Parts for your 2013 Ford Focus-Camshaft sensor

2013 Ford Focus camshaft sensor — what it is and why it matters

Technical sources such as the Ford Workshop Manual (WSM, Section 303-series) and Ford global parts catalogues confirm that every 2013 Ford Focus engine variant uses a camshaft position (CMP) sensor. Ti‑VCT/Ti‑VCT GDI petrol engines (e.g., 1.6 and 2.0) use two CMP sensors—one for the intake cam and one for the exhaust—while other variants still have at least one. The PCM relies on the CMP signal for cam timing and sequential fuel injection, related OBD‑II fault codes include P0340, P0341, P0344 and P0365.

On the 2013 Ford Focus, the camshaft position sensor is a small Hall‑effect sensor that reads a toothed target on the cam to tell the PCM exactly where the camshaft sits in relation to the crank. That’s crucial for quick starts, smooth idle, clean emissions, and the Ti‑VCT’s ability to advance or retard cam timing on the fly. If it goes out of whack, the PCM can’t phase the cams properly, and the car may feel doughy off the line, idle roughly, or throw a check‑engine light.

It’s not a scheduled service item under normal conditions, but it’s smart to give it a look whenever the bonnet’s up for routine servicing. Check the connector for broken tabs, green corrosion, or oil intrusion, and trace the harness for chafe points where it passes around the cam cover. Oil leaks from the rocker cover can wick into the plug and confuse the signal, so fixing any seep early helps keep the sensor happy.

Replacement is straightforward with basic tools. Let the engine cool, disconnect the battery, unplug the sensor, remove the retaining bolt, and gently twist the sensor free. A light smear of clean engine oil on the new O‑ring helps it seat without tearing. Use an OE or high‑quality aftermarket sensor, cheapies can cause intermittent faults. After fitting, clear codes and take a short drive to let the PCM relearn. If faults return immediately, double‑check wiring and, on Ti‑VCT models, verify both intake and exhaust sensors and the crank sensor are reporting cleanly—mechanical timing issues can also trigger CMP codes.

• Common signs of trouble: long cranking, stumbling idle, flat spots, poor fuel economy, and the MIL on with P0340/P0341‑type codes.
• Good practice: keep the area clean, fix leaks, and protect the loom from heat and rubbing.

FAQs

Where is the camshaft sensor on a 2013 Ford Focus?
On most 2013 Focus engines it’s mounted at the end of the camshaft on the cylinder head, accessible from the top near the cam cover. Ti‑VCT engines have two—typically one at the intake end and one at the exhaust end. Under the bonnet, look for small, plug‑in sensors held by a single bolt with a two‑ or three‑pin connector.

What are the symptoms of a failing camshaft sensor?
Expect harder starting, rough idle, hesitation, reduced power, and worse fuel economy. The check‑engine light usually comes on with codes like P0340/P0341/P0365. Because wiring faults and oil leaks can mimic a bad sensor, inspect the plug and loom before throwing parts at it.

Can the camshaft sensor be cleaned, or does it need replacing?
A light external clean won’t hurt, especially if oil has wept onto the plug, but internal electronic faults can’t be fixed with cleaning. If the sensor is cracked, soaked in oil internally, or repeatedly sets CMP codes after wiring checks, replacement is the reliable fix.