OBD Guide
ENFRDEESPT

P1C55

NOX Sensor Intermittent Bank 1 Sensor 1

P1C55 is an OBD-II diagnostic trouble code meaning: NOX Sensor Intermittent Bank 1 Sensor 1. Common causes: poor contact in nox sensor connector, damage to the wiring harness to the sensor. 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 environmental indicators
  • Possible slight loss of engine power
  • Unstable NOX level readings in diagnostic equipment

Causes

  • Poor contact in NOX sensor connector
  • Damage to the wiring harness to the sensor
  • Malfunction of the NOX sensor itself
  • Corroded contacts or damaged wiring
  • Sensor power problems

How to Fix

  1. Check connections and connector of NOX sensor
  2. Inspect the wiring harness for damage
  3. Check the power supply and ground of the sensor
  4. Test the NOX sensor using diagnostic equipment
  5. If necessary, replace the NOX sensor

Related codes

P1C56P1C57P2200

FAQ

What does the P1C55 code mean?

P1C55 is an OBD-II diagnostic trouble code that indicates: NOX Sensor Intermittent Bank 1 Sensor 1

What causes a P1C55 error code?

The most common causes of P1C55 include: Poor contact in NOX sensor connector; Damage to the wiring harness to the sensor; Malfunction of the NOX sensor itself; Corroded contacts or damaged wiring.

How do I fix a P1C55 diagnostic trouble code?

To fix P1C55: Check connections and connector of NOX sensor. Inspect the wiring harness for damage. Check the power supply and ground of the sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1C55?

Yes, but get it checked soon

How much does it cost to fix P1C55?

The estimated repair cost for P1C55 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat