Parts for your 2021 Haval H6-Camshaft sensor

2021 Haval H6 Camshaft Sensor — What It Does, Why It Matters, and When to Replace

Based on factory documentation and industry references, the 2021 Haval H6 is fitted with a camshaft position sensor (CMP). The GWM/Haval workshop manuals for the GW4B15 (1.5T) and GW4N20 (2.0T) engines list the CMP as a key engine control input and include diagnostic routines for DTCs like P0340/P0341. Autodata/HaynesPro engine management overviews and common OBD-II fault references also confirm CMP usage on these turbo four-cylinder, dual-VVT petrol engines.

The camshaft sensor on a 2021 Haval H6 tells the ECU exactly where the camshaft sits in relation to the crank. That timing snapshot lets the ECU fire injectors sequentially, manage spark properly at start-up, and run the variable valve timing on-song. When it’s happy, the H6 starts crisply, idles smoothly, and sips fuel the way it should. When it’s not, you’ll often see a check engine light, lazy cranking, rough idle, flat spots, or codes like P0340/P0341.

These sensors are generally “fit-and-forget”, but they live on the cylinder head where heat and oil vapour are a fact of life. As part of routine servicing, it’s smart to give the connector and loom a quick look under the bonnet—check for brittle insulation, oil wicking into the plug, or a loose retaining clip. On some H6 variants there may be one sensor, others can have a sensor per cam. If the H6 throws a related fault or shows classic symptoms, a new OEM-spec CMP is the go-to fix.

Replacement is straightforward: disconnect the battery, unplug the connector, remove the retaining bolt, and ease the sensor out. Swap the O-ring, lightly oil it, seat the new sensor, and tighten the bolt to factory torque. Avoid over-tightening, a small 1/4-inch ratchet or torque wrench is your mate here. After refit, clear codes and carry out a short drive cycle so the ECU relearns. Some workshops use a scan tool to perform a quick cam/crank correlation just to speed things up.

Quality matters—cheap pattern sensors can cause intermittent faults that’ll drive anyone spare. Stick with a reputable brand or genuine Haval part, keep the connector clean, and you’ll rarely think about the cam sensor again. If in doubt, a proper diagnostic with live data (cam/crank sync, VVT targets vs. actual) is worth its weight in gold.

• Typical symptoms: hard starting, rough idle, poor fuel economy, limp mode, P0340/P0341.
• Service tip: inspect wiring and oil seals at major services (e.g., 60,000 km).
• After replacement: clear codes, perform relearn/drive cycle.

FAQs

Does the 2021 Haval H6 have one or two camshaft sensors?
Most 2021 H6 models run dual overhead cams with variable timing. Depending on engine variant and market spec, there may be one CMP or a sensor for each cam. Checking by VIN in the parts catalogue or a quick visual under the coil cover will confirm what’s fitted to a specific vehicle.

Do camshaft sensors need regular replacement?
Not on a schedule. They’re solid-state and usually last the life of the car. Replace only if there are symptoms or confirmed faults. During services, inspect the connector, wiring, and for any oil leaks around the sensor.

Will the ECU need programming after replacing the sensor?
No coding is typically required. Clear any stored faults and allow a short drive cycle for the ECU to relearn cam/crank correlation. A scan tool can speed this up with a relearn procedure if available.