OBD Guide
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P120C

Secondary Fuel Injector Bank 2 Insufficient Flow

P120C is an OBD-II diagnostic trouble code meaning: Secondary Fuel Injector Bank 2 Insufficient Flow . Common causes: dirty or clogged fuel injector, problems with the fuel pump. Estimated repair cost: $17–89.

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

Symptoms

  • Uneven engine operation
  • Power Loss
  • Increased fuel consumption
  • Dips during acceleration
  • Check Engine Light Illuminates

Causes

  • Dirty or clogged fuel injector
  • Problems with the fuel pump
  • Faulty wiring to the injector
  • Low fuel pressure
  • Engine control unit malfunction

How to Fix

  1. Check the fuel pressure in the system
  2. Clean or replace fuel injector
  3. Check the electrical wiring and connectors of the injector
  4. Check the operation of the fuel pump
  5. Scan the engine control module for additional errors

Related codes

P120AP120BP120D

FAQ

What does the P120C code mean?

P120C is an OBD-II diagnostic trouble code that indicates: Secondary Fuel Injector Bank 2 Insufficient Flow

What causes a P120C error code?

The most common causes of P120C include: Dirty or clogged fuel injector; Problems with the fuel pump; Faulty wiring to the injector; Low fuel pressure.

How do I fix a P120C diagnostic trouble code?

To fix P120C: Check the fuel pressure in the system. Clean or replace fuel injector. Check the electrical wiring and connectors of the injector. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P120C?

Yes, but get it checked soon

How much does it cost to fix P120C?

The estimated repair cost for P120C is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat