OBD Guide

P1085

Fuel Control Mixture Lean Bank 2 Sensor 1

P1085 is an OBD-II diagnostic trouble code meaning: Fuel Control Mixture Lean Bank 2 Sensor 1. Common causes: air leak in intake manifold, malfunction of the mass air flow sensor (maf). Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Increased fuel consumption
  • Reduced engine power
  • Unstable idling
  • Check Engine Light Is On
  • Dips during acceleration

Causes

  • Air leak in intake manifold
  • Malfunction of the mass air flow sensor (MAF)
  • Clogged fuel injectors
  • Low fuel pressure
  • Oxygen sensor malfunction

How to Fix

  1. Check the intake system for air leaks
  2. Check the operation of the mass air flow sensor
  3. Check fuel pressure and condition of fuel filter
  4. Check the condition and operation of the oxygen sensor
  5. Check fuel injectors

Related codes

Error P1085 by Vehicle Brand

FAQ

What does the P1085 code mean?

P1085 is an OBD-II diagnostic trouble code that indicates: Fuel Control Mixture Lean Bank 2 Sensor 1

What causes a P1085 error code?

The most common causes of P1085 include: Air leak in intake manifold; Malfunction of the mass air flow sensor (MAF); Clogged fuel injectors; Low fuel pressure.

How do I fix a P1085 diagnostic trouble code?

To fix P1085: Check the intake system for air leaks. Check the operation of the mass air flow sensor. Check fuel pressure and condition of fuel filter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1085?

Yes, but get it checked soon

How much does it cost to fix P1085?

The estimated repair cost for P1085 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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