LEMON Manuals: Even more car manuals for everyone
Home >> Saturn >> 2010 >> Sky Red Line, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls And Fuel - 2.4L - DTC P0351 To DTC P2544) >> DTC P0641 or P0651 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

The engine control module (ECM) has 2 internal 5 V reference busses called 5 V reference 1 and 5 V reference 2. Each reference buss provides 5 V reference circuits for more than one sensor. A fault condition on one 5 V reference circuit will affect the other 5 V reference circuits connected to that reference buss. The ECM monitors the voltage on the 5 V reference buss.