OBD Guide
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P3168

Fuel Injector Set 2 Commands Signal Message Counter Incorrect

P3168 is an OBD-II diagnostic trouble code meaning: Fuel Injector Set 2 Commands Signal Message Counter Incorrect. Common causes: problems with the can bus, malfunction of the injector control unit. Estimated repair cost: $17–89.

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

Symptoms

  • Rough engine operation
  • Power reduction
  • Increased fuel consumption
  • Intermittent misfires
  • Check engine light comes on

Causes

  • Problems with the CAN bus
  • Malfunction of the injector control unit
  • Damage to wiring between modules
  • Control unit power supply problems
  • ECU software errors

How to Fix

  1. CAN bus diagnostics for communication errors
  2. Checking the integrity of the wiring between the computer and the injector block
  3. Testing the injector control unit
  4. Checking power supply and grounding of modules
  5. Updating the ECU software if necessary

Related codes

P3167P3169P3170

FAQ

What does the P3168 code mean?

P3168 is an OBD-II diagnostic trouble code that indicates: Fuel Injector Set 2 Commands Signal Message Counter Incorrect

What causes a P3168 error code?

The most common causes of P3168 include: Problems with the CAN bus; Malfunction of the injector control unit; Damage to wiring between modules; Control unit power supply problems.

How do I fix a P3168 diagnostic trouble code?

To fix P3168: CAN bus diagnostics for communication errors. Checking the integrity of the wiring between the computer and the injector block. Testing the injector control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3168?

Yes, but get it checked soon

How much does it cost to fix P3168?

The estimated repair cost for P3168 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat