OBD Guide
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P128D

Fuel Rail Temperature Sensor 2 Signal Message Counter Incorrect

P128D is an OBD-II diagnostic trouble code meaning: Fuel Rail Temperature Sensor 2 Signal Message Counter Incorrect. Common causes: fuel rail temperature sensor 2 malfunction, open or short circuit in wiring. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Unstable engine operation
  • Increased fuel consumption
  • Difficulty starting the engine
  • Check Engine Light Is On
  • Reduced engine power

Causes

  • Fuel rail temperature sensor 2 malfunction
  • Open or short circuit in wiring
  • Poor contact in the sensor connector
  • Problems with the engine control module (ECU)
  • CAN bus fault

How to Fix

  1. Check the integrity of the wiring to the sensor
  2. Check the contacts in the sensor connector
  3. Check the resistance of the temperature sensor
  4. Check the operation of the CAN bus
  5. Replace fuel rail temperature sensor 2 if necessary

Related codes

P128CP128EP128F

FAQ

What does the P128D code mean?

P128D is an OBD-II diagnostic trouble code that indicates: Fuel Rail Temperature Sensor 2 Signal Message Counter Incorrect

What causes a P128D error code?

The most common causes of P128D include: Fuel rail temperature sensor 2 malfunction; Open or short circuit in wiring; Poor contact in the sensor connector; Problems with the engine control module (ECU).

How do I fix a P128D diagnostic trouble code?

To fix P128D: Check the integrity of the wiring to the sensor. Check the contacts in the sensor connector. Check the resistance of the temperature sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P128D?

Yes, but get it checked soon

How much does it cost to fix P128D?

The estimated repair cost for P128D is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat