D1130

What the Code Means

D1130 (B0000000 03 001) is a VANOS valve diagnostic code that flags a fault in the exhaust camshaft mechanism (DME exhaust VANOS mechanism). In the original case, diagnosis started with code 2A87 for the DME exhaust VANOS mechanism, then followed service bulletin SIB 110208 and test plan B1214 NG6NWA (exhaust camshaft position sensor), which yielded the final D1130 code for the VANOS valve.

The code points to a problem in the control or operation of the exhaust camshaft VANOS solenoid: the DME detects a mismatch between the commanded and actual camshaft timing position.

Symptoms

• Check Engine Light with no noticeable symptoms and no check control messages on the instrument cluster;
• the fault appeared twice during a trip of about 320 miles, both times cleared with a diagnostic scanner and did not return until the next episode.

Diagnosis and Repair

Step 1. Read Codes and Run Test Plans

Read the DME codes (in the original case, 2A87 for the exhaust VANOS mechanism), run SIB 110208 and test plan B1214 NG6NWA (Exhaust camshaft sensor) through ISTA. The test plan results log the VANOS valve code D1130 (B0000000 03 001).

Step 2. Check the Lubrication System

VANOS operation depends on oil pressure and cleanliness. Check the oil filter cap — in the original case its condition was rated normal (OK).

Step 3. Replace the VANOS Solenoids and Oil

Replace both VANOS solenoids (intake and exhaust camshaft). Change the oil and oil filter at the same time.

Step 4. Clear Codes and Verify

Clear all fault codes and check engine operation. In the original case, after replacing both solenoids, the oil, and the filter, the engine ran normally and the fault did not return.