130F20
High130F20 — Exhaust Camshaft: Angle Relative to Crankshaft Out of Tolerance
Description
What the Code Means
130F20 logs that the exhaust camshaft position relative to the crankshaft is out of tolerance. Typical causes are a faulty VANOS unit, a stretched timing chain, or problems with the oil control valve (OCV).
The fault can be intermittent: the code often shows up after 5–10 miles of mileage. The exhaust VANOS can stick in the advanced position because of restricted oil passages or failed components.
Symptoms
Symptoms
- Check Engine Light;
- limp-in mode;
- intermittent code, often 5–10 miles into a drive;
- exhaust VANOS stuck in the advanced position.
Causes and fixes
Diagnosis and Repair
- Connect ISTA, confirm the code, and watch VANOS adaptations in real time.
- Check the oil control valve (OCV): resistance should be in the 7–12 Ω range, and verify it actuates.
- If the VANOS gear seizes, replace it along with the central bolt (OEM BMW
11367579070). - Inspect the timing chain tensioner and guides for wear.
- If the passages are clogged, an engine oil flush with ATF can clean the oil galleries.
Possible secondary damage
Indirect Issues
- If ignored, the fault can lead to timing chain jump, valve-to-piston contact, and catastrophic engine failure;
- metal debris from worn chain guides clogs the oil passages, which damages the camshaft bearings.