OBD Guide

P28B5

Cylinder 10 Ion Current Sense Circuit Range/Performance

P28B5 is an OBD-II diagnostic trouble code meaning: Cylinder 10 Ion Current Sense Circuit Range/Performance. Common causes: open or short circuit in the ion current circuit, malfunction of the ion current sensor of cylinder 10. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Unstable engine operation
  • Increased fuel consumption
  • Reduced engine power
  • Check Engine light comes on
  • Possible misfires

Causes

  • Open or short circuit in the ion current circuit
  • Malfunction of the ion current sensor of cylinder 10
  • Wiring Harness Problems
  • Engine control unit malfunction
  • Contact corrosion

How to Fix

  1. Check the integrity of the ion current circuit of cylinder 10
  2. Check the ion current sensor for damage
  3. Inspect the wiring harness for damage
  4. Check contacts for corrosion
  5. If necessary, replace the sensor or repair the wiring

Related codes

Error P28B5 by Vehicle Brand

FAQ

What does the P28B5 code mean?

P28B5 is an OBD-II diagnostic trouble code that indicates: Cylinder 10 Ion Current Sense Circuit Range/Performance

What causes a P28B5 error code?

The most common causes of P28B5 include: Open or short circuit in the ion current circuit; Malfunction of the ion current sensor of cylinder 10; Wiring Harness Problems; Engine control unit malfunction.

How do I fix a P28B5 diagnostic trouble code?

To fix P28B5: Check the integrity of the ion current circuit of cylinder 10. Check the ion current sensor for damage. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P28B5?

Yes, but get it checked soon

How much does it cost to fix P28B5?

The estimated repair cost for P28B5 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat