Howo A7 fault codes

Howo A7 still runs WD615 and early WP10. Codes are simpler than new T7H VGT geometry — more fuel, air and crank sensor.

Engines: WD615, WP10.

Frequent codes

Rail pressure, intake leaks, CKP, ECU power. On WD615 some codes flash; on WP use scanner P/SPN.

• 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

Do not copy a T7H WP13 repair one-for-one onto A7 WD615 — different sensors and harnesses.

Fault code table

Frequent codes for Howo A7. 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 — Howo, A7. Fault codes.

Look up the code in the service