Parts for your 2021 Haval H6-Crank angle sensor

2021 Haval H6 crank-angle-sensor: purpose, servicing and replacement

Technical sources including the GWM/Haval H6 (2021–) Workshop Manual (Engine Control System), GW4B15A/GW4N20 engine technical descriptions, and Haval electronic parts catalogues all show the 2021 Haval H6 is fitted with a crankshaft position sensor, commonly called a crank‑angle‑sensor (CKP). It’s a core input for the ECU and absolutely relevant to this model.

The crank‑angle‑sensor on the 2021 Haval H6 is the ECU’s timekeeper, tracking crank speed and exact crank position so ignition timing, fuel injection, variable valve timing and misfire detection all happen right on cue. Lose that signal and the H6 can crank but won’t fire, or it’ll stall and throw a check‑engine light. On most H6 variants the CKP sits low on the block near the flywheel/bellhousing, some layouts place it near the crank pulley. Either way, it reads teeth on a reluctor wheel and sends a precise waveform the ECU can trust at idle and at motorway speeds.

There’s no routine replacement interval for the CKP, it’s a fit‑and‑forget item until symptoms crop up. Good practice during servicing is to keep the connector clean and dry, inspect the harness for rub‑through near the sump and transmission, and avoid blasting the area with high‑pressure water. If the H6 shows hard starting, intermittent stalling, rough running, or codes like P0335–P0339, it’s time for a proper diagnosis before swapping parts.

• Typical symptoms: long crank/no start, sudden stall, erratic tacho, poor fuel economy, check‑engine light.
• Common causes: heat‑soaked sensor, damaged wiring, metal debris on the tip (for magnetic types), poor connector fit.

Replacing the crank‑angle‑sensor is usually straightforward: disconnect the battery, safely raise the front, remove the under‑tray if fitted, unplug the sensor, remove the single retaining bolt, and pull the sensor straight out. Lightly oil the O‑ring on the new unit, seat it squarely, reinstall the bolt to the workshop‑manual torque, and route the harness exactly as the factory did. After refitting, clear fault codes and perform a crankshaft variation relearn with a scan tool so the ECU’s misfire monitoring is spot on. Most shops will book 0.5–1.0 hours and the part cost sits in the typical CKP range for late‑model SUVs in Australia and New Zealand.

Stick with quality OE‑spec parts, keep the loom tidy, and the H6’s timing and drivability will stay crisp for many kilometres.

FAQs

Does the 2021 Haval H6 actually have a crank‑angle‑sensor?
Yes. Workshop and engine technical documents for the GW4B15A/GW4N20 engines list a crankshaft position (crank‑angle) sensor as a key ECU input, and the parts catalogue shows a serviceable CKP unit.

What are the tell‑tale signs the H6 crank‑angle‑sensor is failing?
Hard starting, no start with fuel and spark present, random stalling when hot, shaky idle, poor fuel economy, and a check‑engine light with codes like P0335–P0339 are common. An erratic tacho during cranking can also point to a weak CKP signal.

Do you need a relearn after replacing the CKP on a 2021 H6?
It’s recommended. Clearing codes and running a crank variation relearn with a capable scan tool helps the ECU accurately detect misfires and stabilises idle quality after sensor replacement.