Parts for your 2019 Honda Civic-Camshaft sensor

2019 Honda Civic camshaft sensor — purpose, care, and replacement

Based on technical references, the 2019 Honda Civic does use a camshaft position (CMP) sensor. Honda’s 2019 Civic service information details CMP Sensor A/B in the Engine Control section, and the Honda parts catalogue lists camshaft position sensors for both the 1.5L turbo (L15B7) and 2.0L (K20C2) engines. The model’s OBD-II diagnostics also define CMP-related fault codes (e.g., P0340, P0341, P0365, P0366), confirming this sensor is fitted and actively used for engine management.

The camshaft sensor is a small but critical bit of kit on the 2019 Civic. It tells the engine control unit exactly where the camshaft is in its rotation so timing can be spot on for fuel injection, spark, and Honda’s variable valve timing control. That clean timing signal helps the Civic fire up quickly, run smoothly at idle, make good power on the open road, and keep fuel economy in check. It also lets the ECU detect misfires accurately and manage start-up strategies on cold mornings under the bonnet.

There’s no scheduled maintenance for a CMP sensor, but a quick look-over during servicing is smart. Check the connector for corrosion, oil seepage around the O-ring, and any wiring chafe near the cylinder head. Clean, intact wiring means a reliable signal and fewer gremlins. Common symptoms of a failing sensor include:

• Long cranking, rough idle, or stalling after start
• Flat spots, limp mode, or poor fuel economy
• Check engine light with codes like P0340/P0341/P0365/P0366

Replacement on a 2019 Civic is straightforward for a competent technician. On many 1.5L turbo variants there are two sensors (intake “Sensor A” and exhaust “Sensor B”), the 2.0L typically runs a single sensor. Usual steps are: disconnect the battery negative, remove the engine cover, unplug the sensor, undo the retaining bolt, and pull the sensor straight out. Lightly oil the new O-ring, seat the new unit, refit the bolt, and reconnect the plug. After fitting, clearing fault codes and performing an idle relearn helps the ECU settle. Sticking with an OEM-quality sensor avoids signal quality issues that can cause intermittent faults. If wiring damage or oil intrusion is found, it’s wise to sort that at the same time so the new sensor isn’t let down by a dodgy connector.

Where is the camshaft sensor on a 2019 Honda Civic?

It sits on the cylinder head at the end of the camshaft(s), usually under the plastic engine cover. The 1.5L turbo commonly has two sensors—one on the intake side (Sensor A) and one on the exhaust side (Sensor B). The 2.0L typically has a single unit on the intake side.

Can a 2019 Civic be driven with a bad camshaft sensor?

It may start and run using backup strategies, but drivability often suffers—think hard starting, rough running, or limp mode. Continued driving risks stalling and catalyst damage, so it’s best to diagnose and fix it promptly.

Do camshaft sensors need regular servicing?

There’s no routine replacement interval. During normal servicing, a quick inspection of the connector, wiring, and any oil seepage is enough. If faults or related codes appear, testing and replacement is the go.