Howo (HOWO) diagnostics — WD615, WP10, WP13 fault codes

Howo (HOWO) in the field is rail, crank sensor and CAN — not a mystery Chinese code. Drivers search no pull, no start, derate, Check Engine. A7 is WD615/WP10, T7H is WP13/MC11/MC13, T5G is lighter MC07/WP7/WP10. ChinaDiag matches the code to the service database and gives a check order. OEM only if the number is in the card.

Models and engines

WD615 hates dirty feed and filters. WP10 on Howo is rail, metering valve, CKP at the flywheel. WP13 adds VGT: no-pull is often P0299. Pick the exact model on the home form.

Symptoms

• no pull after fueling;
• cranks, no start;
• power limit with MIL;
• cluster U-codes, scanner cannot see the engine.

Frequent Howo codes

• P0087 — low common-rail pressure
• P0088 — high common-rail pressure
• P1011 — HP pump metering valve fault
• P0093 — large fuel leak / CAN trap — FMI needed
• P0193 — rail pressure sensor high signal
• P0299 — boost below target
• P2263 — turbo / boost performance
• P2563 — VGT position sensor — range / performance
• P0335 — crankshaft sensor no signal
• P0340 — camshaft sensor (CMP) — FMI needed
• P0401 — EGR insufficient flow
• U0100 — lost communication with engine ECU
• U0101 — lost communication with TCM
• U0155 — lost communication with instrument cluster
• P0562 — system voltage low
• P0201 — cylinder 1 injector circuit
• P0480 — fan control circuit
• P0217 — engine overheat
• P0116 — water in fuel (Weichai table) / not always coolant SAE
• P2509 — intermittent ECM power (no OEM in DB)
• SPN 2898 — without FMI — not a diagnosis (config / Weichai grid)
• SPN 729 — intake heater — FMI needed

Drain the separator before you condemn the pump. Cab-frame flex is U0100, not a remap. Use the home form, Howo + engine + code or a scanner photo.

Fault code table

Frequent Howo codes (Weichai/MC engine and EBS/network). Not a full SPN catalog — workshop hits for search and diagnosis.

Full step-by-step — enter the code on the home page. If a card exists, click the code.

Look up the code in the service