27B6
High27B6 — Intake VANOS Control Circuit Fault, Bank 2
Description
What the Code Means
27B6 flags a control problem with the intake VANOS on bank 2. It's the same fault as 27B5, but on the second cylinder bank — cylinders 4–6 on V-configuration engines.
Normally the VANOS solenoid delivers oil to the camshaft phasing mechanism on a DME command, and the DME watches the system's response. If the command goes out and the expected result doesn't follow, the module logs a control fault. Possible causes: a bad solenoid, a wiring break, or a DME fault.
Symptoms
Symptoms
- loss of power;
- rough running;
- Check Engine light on;
- increased oil consumption.
Causes and fixes
Diagnosis and Repair
- Read the codes and run diagnostics through ISTA.
- Check the bank 2 VANOS solenoid: winding resistance should be in the 7–12 ohm range.
- Check the solenoid's power and control circuits — a wiring break produces the same symptoms as a failed solenoid.
- If the solenoid is bad, replace it with an original
11367579071. - If the solenoid and wiring check out, consider a DME fault as the cause.
Possible secondary damage
Secondary Problems
If you put off the repair, you can get uneven VANOS operation, timing chain wear, and catalytic converter damage.