939005160 - Y029 P0271 - CYLINDER 4 INJECTOR

The diagnostic equipment signals: Error P0271 (Injector for cylinder 4)
This error is detected during the diagnosis of the junction unit final stage if there is a short circuit to earth/positive or break in the connecting circuit at Pins 17 and 33 of the junction unit. The fault is memorized directly as soon as it is recognized. In this case the engine is switched off. STEP
1INJECTOR CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the injector is working properly.    See Test 1060FA INJECTOR OPERATION CHECKEnd of diagnosis