![]() If both of these codes are displayed simultaneously, and the codes only appear after the motor is revved above 1800RPM, then the issue is likely that the cam chain tensioners were installed on the incorrect heads (drivers' tensioner on passenger head, etc). ![]() When found in a 30-valve V6 gasoline Audi engine (such as EPB or BEL), DTC 17755 may be stored as well.The previous Technical Bulletin number was 15-04-01. When found in VR6 4 Valve (BDF, BJS, BAA,) engines in conjunction with 17755 please see Technical Bulletin 15-07-03.When found in the 1.8T engine (possibly others too), check to make sure the correct G40 is installed (single gap versus 4 gap).When found in the 1.8T engine, check engine oil pressure.Check/Replace Engine Speed Sensor (G28).Check/Replace Camshaft Position Sensor (G40).Use Measuring Value Blocks (MVB) to Check Timing Chain. ![]() Timing Belt/Chain incorrectly installed.Correlationġ7748/P1340/004928 - Camshaft Position Sensor (G40) / Engine Speed Sensor (G28): Incor. ![]()
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