17748/P1340/004928
From Ross-Tech Wiki
17748/P1340/004928 - Camshaft Position Sensor (G40) / Engine Speed Sensor (G28): Incor. Correlation
Possible Causes
- Timing Belt/Chain incorrectly installed
- Timing Chain probably lengthened
- Camshaft Position Sensor (G40) faulty
- Engine Speed Sensor (G28) faulty
Possible Solutions
- Check Timing Belt/Chain installation
- Use Measuring Value Blocks (MVB) to Check Timing Chain
- Check/Replace Camshaft Position Sensor (G40)
- Check/Replace Engine Speed Sensor (G28)
Special Notes
- When found in the 1.8T engine, check engine oil pressure. The oil pump pickup may be restricted.
- 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 on VR6 engine, please see Technical Bulletin 15 04-01
- When found in a 30-valve V6 gasoline Audi engine (such as EPB or BEL), DTC 17755 may be stored as well. 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).