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Parts for your 2020 Haval H6-Throttle position sensors
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2020 Haval H6 throttle‑position sensor (TPS): what it does and how to look after it
On the 2020 Haval H6, a throttle‑position sensor is very much used. Technical references including the Haval/Great Wall factory workshop information for the 2017–2020 H6 (GW4B15 1.5T and GW4C20 2.0T engines) describe an electronic throttle body (ETB) with an integrated, dual‑channel throttle‑position sensor that the engine control module continuously monitors. Standard OBD‑II diagnostics for this model include throttle position data and related DTCs (e.g., P0120–P0124), confirming the TPS is a fitted and monitored component.
On this H6, the TPS tells the ECU exactly where the throttle plate sits, so fuelling, ignition timing and boost control can be dialled in smoothly. Paired with the accelerator pedal position sensor, it’s the key to that drive‑by‑wire feel—crisp take‑off without hunting, steady idle with the A/C on, and predictable power when overtaking. Because it’s built into the ETB, it also acts as a safety check: the ECU compares commanded versus actual throttle angle and will drop into limp mode if things don’t line up.
Owners who keep an eye on the TPS and throttle body during regular servicing tend to avoid annoying drivability niggles. Typical clues that the TPS signal isn’t happy include:
- Rough or high idle, hesitation, or on‑off surging
- Sluggish response, poor fuel economy, or a check‑engine light
- Stored codes like P0120–P0124 or throttle actuator range/performance faults
Replacement on the 2020 H6 usually means swapping the entire electronic throttle body, as the TPS isn’t sold separately. Before condemning the unit, a tech should scan live data for smooth throttle‑angle change, inspect the connector for corrosion, and verify stable 5V reference and ground. If the throttle body needs replacing, budget for a new gasket and an adaptation (relearn).
- Disconnect the battery and let the vehicle sleep.
- Remove the intake ducting, unbolt the ETB, and fit the new assembly to spec torque.
- Reconnect, then perform throttle/idle adaptation with a scan tool, complete a short drive cycle so the ECU relearns.
As part of routine servicing, it’s fine to clean light carbon on the throttle bore with sensor‑safe cleaner, but don’t flood the motor housing. Many workshops check operation every 30–60,000 kilometres or whenever drivability changes after a battery swap or intake work.
Popular question: What are the signs the TPS is failing on a 2020 Haval H6?
Common symptoms include erratic or high idle, stumble off the line, on‑off surging at steady speed, and worse fuel use. The check‑engine light may come on with throttle‑related codes (P0120–P0124), and the car may enter limp mode if the ECU sees a mismatch between commanded and actual throttle angle.
A scan of live data will usually show flat spots or jumpy throttle‑angle readings as the pedal is moved slowly. Always rule out wiring or connector issues before replacing parts.
Popular question: Can the TPS be replaced on its own, or does the whole throttle body need changing?
On the 2020 H6 the TPS is integrated into the electronic throttle body and isn’t serviced separately. If the sensor is faulty, the fix is to replace the complete throttle body assembly, fit a new gasket, and carry out a throttle/idle adaptation with a compatible scan tool.
Popular question: Does the H6 need a throttle relearn after cleaning or battery disconnection?
It’s a good idea. After throttle body work, battery disconnects or ECU updates, perform an electronic throttle adaptation. Many scan tools have an ETC reset for the H6, otherwise a short drive cycle with gentle, varied throttle often lets the ECU relearn. If idle stays unstable, perform the guided adaptation and clear any stored codes.
