Weichai WP10, WP12, WP13 engine faults — lookup

Weichai WP10/WP12/WP13 sit on Howo, Shacman, Sitrak and some buses. Bosch common-rail: rail sensor, metering valve, CKP at the flywheel. Scanner shows SAE plus an internal Weichai number — both can go into ChinaDiag.

WP10–WP13

WP10 is the A7/F3000 volume engine. WP13 on tractors adds intake sensors and a heavier VGT. Do not mix internal Weichai P-codes with SAE (P0116 is the textbook trap).

Symptoms

• no pull / derate;
• no start — CKP or ECU power;
• misfire P0201;
• water in fuel after a barrel.

Frequent Weichai 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

Filter OEM VG1540080010 appears on the P0087 card for that cause — still confirm on the truck. Pick the vehicle the Weichai is sitting in.

Fault code table

Codes most often tied to Weichai WP10/WP12/WP13 on Howo, Shacman and Sitrak.

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