RepairPal Certified shops can diagnose and repair your 2004 Isuzu Ascender. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
The exact position of a knock sensor varies by year, make and model. As a general rule, it is located in the 'V' of a six or eight cylinder engine. Or it is attached to the block/head. Don't know which engine you have, but located on the back third in the middle of the engine. It's purpose is to 'hear' pre-ignition or 'ping' for misfires so the engine management computer can adjust timing.
