Weichai WP12 fault codes

WP12 bridges WP10 and WP13 — rail classics plus more VGT tickets (P0299/P2563).

Engines: WP12.

Frequent codes

Rail, VGT position, CKP, CAN.

• 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
• P0335 — crankshaft sensor no signal
• P0340 — camshaft sensor — FMI needed
• P0401 — EGR insufficient flow
• U0100 — lost communication with engine ECU
• U0101 — lost communication with TCM
• U0155 — lost communication with cluster

Field notes

Common on Howo T7H and Shacman X3000 — pick both brand and engine.

Fault code table

Frequent codes for Weichai Wp12. Cards link when a public page exists.

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

How to use

home page — Weichai, WP12. Fault codes.

Look up the code in the service