OBD Guide
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P1DD1

Input-Turbine Speed Sensor 1 Gradient Fault

P1DD1 is an OBD-II diagnostic trouble code meaning: Input-Turbine Speed Sensor 1 Gradient Fault. Common causes: turbine speed sensor malfunction, damage to the sensor wiring harness. Estimated repair cost: $33–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–89 (est.)

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Unstable engine operation
  • Check Engine Indication
  • Turbo problems

Causes

  • Turbine speed sensor malfunction
  • Damage to the sensor wiring harness
  • Poor contact in the sensor connector
  • Mechanical problems of the turbocharger
  • Control unit software error

How to Fix

  1. Check the condition of the turbine speed sensor
  2. Check the integrity of wiring and connectors
  3. Test sensor resistance
  4. Check the condition of the turbocharger
  5. Reset the error and take a test drive

Related codes

P0299P2262P2563

FAQ

What does the P1DD1 code mean?

P1DD1 is an OBD-II diagnostic trouble code that indicates: Input-Turbine Speed Sensor 1 Gradient Fault

What causes a P1DD1 error code?

The most common causes of P1DD1 include: Turbine speed sensor malfunction; Damage to the sensor wiring harness; Poor contact in the sensor connector; Mechanical problems of the turbocharger.

How do I fix a P1DD1 diagnostic trouble code?

To fix P1DD1: Check the condition of the turbine speed sensor. Check the integrity of wiring and connectors. Test sensor resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1DD1?

Yes, but get it checked soon

How much does it cost to fix P1DD1?

The estimated repair cost for P1DD1 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat