2012 Toyota Prius V Three – Runs Only With Scan Tool Connected
- Aug 16
- 1 min read
CUSTOMER CONCERN
After engine installation, the engine runs only while a scan tool is connected and DTCs P0032, C1259, C1310, and U0100 are present.
CAUSE
The D1 engine-control-module ground at the valve cover was loose, interrupting the ECM ground path.
CORRECTION
Tighten and secure the D1 ECM ground connection at the valve cover.
