OBD Guide

P230B

Cylinder 2 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

P230B is an OBD-II diagnostic trouble code meaning: Cylinder 2 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance. Common causes: dirty or faulty fuel injectors, vacuum leaks in cylinder 2. Estimated repair cost: $17–89.

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

Symptoms

  • Unstable engine operation
  • Increased fuel consumption
  • Reduced engine power
  • Dips during acceleration
  • Check Engine Light Illuminates

Causes

  • Dirty or faulty fuel injectors
  • Vacuum leaks in cylinder 2
  • Problems with the ignition system (plugs, coils)
  • Oxygen sensor malfunction
  • Engine mechanical problems (compression)

How to Fix

  1. Check the condition of the fuel injectors, clean or replace if necessary.
  2. Check the tightness of the intake tract on cylinder 2
  3. Check the condition of the spark plugs and coils
  4. Check oxygen sensor readings
  5. Measure compression in cylinder 2

Related codes

Error P230B by Vehicle Brand

FAQ

What does the P230B code mean?

P230B is an OBD-II diagnostic trouble code that indicates: Cylinder 2 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

What causes a P230B error code?

The most common causes of P230B include: Dirty or faulty fuel injectors; Vacuum leaks in cylinder 2; Problems with the ignition system (plugs, coils); Oxygen sensor malfunction.

How do I fix a P230B diagnostic trouble code?

To fix P230B: Check the condition of the fuel injectors, clean or replace if necessary.. Check the tightness of the intake tract on cylinder 2. Check the condition of the spark plugs and coils. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P230B?

Yes, but get it checked soon

How much does it cost to fix P230B?

The estimated repair cost for P230B is $17–89. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat