Back to 2018 Audi R8

2018 AUDI R8

5.2L V10 (Gen 2, 562hp)AWDDCTgas
Repairs0Labor515Torque2494Fluid9DTC922Battery0Maintenance0Recalls0
P1213high severityPowertrain

Cylinder 1 Fuel Injector Short to Positive

on 2018 Audi R8 5.2L V10 (Gen 2, 562hp) · AWD

What this code means

The ECU detected a short to positive (battery voltage) in the Cylinder 1 fuel injector circuit. This prevents proper injector control and causes a misfire or over-fueling condition on that cylinder.

Symptoms

  • Check Engine Light
  • Misfire on Cylinder 1
  • Rough idle
  • Possible rich condition
  • Reduced power

Common causes

  • Damaged injector wiring shorted to power
  • Faulty fuel injector Cylinder 1
  • Connector damage or melted wire
  • ECU injector driver failure

Diagnostic steps

  1. Test injector resistance Cylinder 1
  2. Inspect wiring for damage or shorts to power
  3. Check injector connector
  4. Swap injector with another cylinder to isolate
  5. Test ECU driver output

Repair notes

Repair the shorted wiring or replace the faulty fuel injector on Cylinder 1.

Other Powertrain codes on this vehicle

Building an app?
Free API access to all this data — 50 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →