Parts for your 2018 Haval H6-Crank angle sensor

2018 Haval H6 crank-angle sensor: purpose, servicing and replacement

Technical documentation confirms the 2018 Haval H6 does use a crank‑angle sensor (commonly called the crankshaft position or CKP sensor). Haval’s factory workshop manuals for MY2017–2019 H6 models covering the GW4C20 2.0‑litre turbo and GW4G15B 1.5‑litre turbo engines specify the CKP sensor as part of the engine control system, with OBD‑II faults including P0335–P0339 for CKP circuits. The Haval electronic parts catalogue lists the CKP sensor as a serviceable component, and independent data sources used in AU/NZ workshops (e.g., Autodata and OEM engine management literature) describe these engines as reliant on crank‑angle input for ignition and injection synchronisation. So it’s absolutely relevant and fitted to the 2018 H6.

On the 2018 Haval H6, the crank‑angle sensor reads a toothed wheel on the crankshaft to tell the ECU exactly where the engine is in its rotation and how fast it’s spinning. That signal lets the ECU fire the spark and inject fuel at the right moment, sync with the cam sensor for variable valve timing, detect misfires, and manage starting. If the CKP drops out, the engine may crank but not start, or it might cut out unexpectedly and throw a check‑engine light.

While the CKP isn’t a routine service item, it benefits from basic care during scheduled maintenance. Keep the connector clean and secure, check for oil leaks that might contaminate the sensor, and ensure the harness isn’t rubbing on the block or exhaust. If symptoms appear—hard starting, intermittent stalling, rough idle, or a dead tach while cranking—scan for codes before throwing parts at it.

• Common symptoms of a failing CKP: no‑start when hot, sudden stall, long crank, erratic rev counter, and DTCs P0335–P0339.
• Quick checks: verify power/earth at the sensor plug, inspect wiring for chafe, and confirm sensor gap/seat is clean.

Replacement is straightforward for a trained tech. Disconnect the battery, access the sensor (typically low on the block near the bellhousing on 2.0T, some 1.5T units are at the front by the crank pulley), remove the retaining bolt, swap the sensor and O‑ring, and route the loom exactly as per factory. Use an OEM‑quality part, avoid forcing the sensor against the reluctor, and torque the fastener correctly. After installation, clear fault codes and perform a crankshaft position relearn with a scan tool if the ECU supports it—this helps restore crisp starts and smooth idle. If the engine still plays up, inspect the reluctor wheel/flywheel teeth and update any applicable ECU calibrations.

FAQs

Where is the crank‑angle sensor located on a 2018 Haval H6?
On most AU/NZ‑delivered 2.0‑litre turbo petrol H6 (GW4C20), the CKP sensor sits low on the engine block by the transmission bellhousing, reading the flywheel/reluctor. Some 1.5‑litre turbo variants position it toward the front near the crank pulley. Best practice is to confirm by VIN against the workshop manual.

Does the crank‑angle sensor need regular servicing?
There’s no scheduled replacement interval. Treat it as inspect‑and‑as‑needed: keep the connector clean and dry, check the harness routing, and address any oil seepage. Replace only if diagnostics point to a faulty sensor or damaged wiring.

Is it safe to drive with a dodgy crank‑angle sensor?
Not really. A failing CKP can cause intermittent stalling or a complete no‑start. If the engine is cutting out or logging CKP faults, it’s safer to park it and arrange a tow to avoid being stranded or creating a hazard in traffic.