OBD Guide
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P1020

Valvetronic Eccentric Shaft Sensor Power Supply

P1020 is an OBD-II diagnostic trouble code meaning: Valvetronic Eccentric Shaft Sensor Power Supply. Common causes: open or short circuit in the sensor power supply circuit, faulty relay or fuse. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Unstable idling
  • Check Engine light comes on
  • Dips during acceleration

Causes

  • Open or short circuit in the sensor power supply circuit
  • Faulty relay or fuse
  • Wiring Harness Problems
  • Malfunction of the sensor itself
  • Poor contact in the connector

How to Fix

  1. Check fuses and relays associated with the Valvetronic system
  2. Inspect the wiring harness for damage
  3. Check the voltage at the sensor connector
  4. Test the eccentric shaft sensor
  5. Replace sensor if necessary

Related codes

P1019P1021P1022

FAQ

What does the P1020 code mean?

P1020 is an OBD-II diagnostic trouble code that indicates: Valvetronic Eccentric Shaft Sensor Power Supply

What causes a P1020 error code?

The most common causes of P1020 include: Open or short circuit in the sensor power supply circuit; Faulty relay or fuse; Wiring Harness Problems; Malfunction of the sensor itself.

How do I fix a P1020 diagnostic trouble code?

To fix P1020: Check fuses and relays associated with the Valvetronic system. Inspect the wiring harness for damage. Check the voltage at the sensor connector. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1020?

Limited driving only, diagnose soon

How much does it cost to fix P1020?

The estimated repair cost for P1020 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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