OBD Guide
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P11BE

O2 Reference Voltage Circuit (NOx Sensor 2)

P11BE is an OBD-II diagnostic trouble code meaning: O2 Reference Voltage Circuit (NOx Sensor 2). Common causes: open or short circuit in the nox sensor circuit, poor contact in the sensor connector. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine Light Is On
  • Deterioration of engine performance
  • Increased fuel consumption
  • Dips during acceleration
  • Increased level of harmful emissions

Causes

  • Open or short circuit in the NOx sensor circuit
  • Poor contact in the sensor connector
  • NOx 2 sensor malfunction
  • Wiring Harness Problems
  • Engine control unit malfunction

How to Fix

  1. Check the integrity of the wiring to the NOx sensor 2
  2. Inspect the sensor connectors for corrosion or damage.
  3. Check the reference voltage at the sensor
  4. Test NOx sensor 2
  5. Replace NOx 2 sensor if necessary

Related codes

P11BDP11BFP11C0

FAQ

What does the P11BE code mean?

P11BE is an OBD-II diagnostic trouble code that indicates: O2 Reference Voltage Circuit (NOx Sensor 2)

What causes a P11BE error code?

The most common causes of P11BE include: Open or short circuit in the NOx sensor circuit; Poor contact in the sensor connector; NOx 2 sensor malfunction; Wiring Harness Problems.

How do I fix a P11BE diagnostic trouble code?

To fix P11BE: Check the integrity of the wiring to the NOx sensor 2. Inspect the sensor connectors for corrosion or damage.. Check the reference voltage at the sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P11BE?

Yes, but get it checked soon

How much does it cost to fix P11BE?

The estimated repair cost for P11BE is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat