Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Code 52
DRB displays SYSTEM RICH L-IDLE ADAP AT LEAN LIMIT. Condition is: oxygen sensor signal input indicates rich air/fuel ratio condition at left O2S during engine operation. If vehicle is equipped with dual O2S, DRB will identify left or right O2S.
DRB displays SYSTEM RICH R-IDLE ADAP AT LEAN LIMIT. Condition is: oxygen sensor signal input indicates rich air/fuel ratio condition at right O2S during engine operation. If vehicle is equipped with dual O2S, DRB will identify left or right O2S.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.