Multi-code OBD2 diagnosis
Enter all the codes your scanner showed, not just the first one. We give you the overall severity, whether you can keep driving, the order in which to check them and how they relate to each other.
Summary
- Overall severity
- Medium
- Can I keep driving?
- Yes, but with caution
- Estimated cost
- $20 to $900
- Codes analyzed
- 1 of 1
The order below is the recommended one: first the codes that can cause the others. After each repair, clear the codes and check which ones come back.
Order of inspection
P1656 VVT Oil Control Valve (OCV) Circuit (Toyota) Medium
On Toyota and Lexus vehicles, the P1656 code means the VVT oil control valve (OCV) circuit is open or shorted. You may notice a rough idle, a loss of power and sometimes a rattle at startup. Other brands may define this number differently.