OBD Guide
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P122F

Nitrogen Oxide Sensor Binary Oxygen Sensor Short Circuit

P122F is an OBD-II diagnostic trouble code meaning: Nitrogen Oxide Sensor Binary Oxygen Sensor Short Circuit. Common causes: nox sensor circuit short circuit, damage to the sensor wiring harness. 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 comes on
  • Reduced engine power
  • Increased fuel consumption
  • The car goes into emergency mode
  • Increased emissions

Causes

  • NOx sensor circuit short circuit
  • Damage to the sensor wiring harness
  • Binary oxygen sensor malfunction
  • Problems with sensor connectors
  • Engine control unit malfunction

How to Fix

  1. Check the integrity of the NOx sensor wiring harness
  2. Check sensor connectors for corrosion or damage.
  3. Check the resistance and voltage in the sensor circuit
  4. Replace NOx sensor or binary oxygen sensor if necessary
  5. Check and update engine control unit software

Related codes

P122EP1230P1231

FAQ

What does the P122F code mean?

P122F is an OBD-II diagnostic trouble code that indicates: Nitrogen Oxide Sensor Binary Oxygen Sensor Short Circuit

What causes a P122F error code?

The most common causes of P122F include: NOx sensor circuit short circuit; Damage to the sensor wiring harness; Binary oxygen sensor malfunction; Problems with sensor connectors.

How do I fix a P122F diagnostic trouble code?

To fix P122F: Check the integrity of the NOx sensor wiring harness. Check sensor connectors for corrosion or damage.. Check the resistance and voltage in the sensor circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P122F?

Yes, but get it checked soon

How much does it cost to fix P122F?

The estimated repair cost for P122F is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat