Audi P1238: Cylinder 2 Fuel Injection Circuit Open Circuit

Is your scanner showing Audi P1238?
No worries. We'll show you what it means and how to deal with it.

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OBD Codex, Administrator

Audi P1238: Cylinder 2 Fuel Injection Circuit Open Circuit

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What Does The Audi P1238 Code Mean?

This code is set in this condition:

Key on or engine running, fuses in the instrument panel and the E-box in the engine compartment must be functioning, and the ground connections between the engine ad the chassis must be well connected; and the ECM detected an unexpected voltage condition on the injector circuit. Wiring or fuel injector has a short circuit that is open.

What Are The Potential Causes Of The Audi P1238 Code?

Below are some potential causes of this DTC:

  • Injector control circuit is open
  • Injector power circuit (B+) is open
  • Injector control circuit is shorted to chassis ground
  • Injector is damaged or has failed
  • ECM is not connected or has failed
  • Fuel pump relay has failed
  • Engine speed sensor has failed

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> Beck/Arnley 090-5145 Vehicle Speed Sensor
>>> EPSIRMP 06H906036G 4pcs Fuel Injectors Compatible with Audi A3 A4 A5 A6 Q3 Q5 TT
>>> URO Parts 191906383C Fuel Pump Relay

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

Audi A4 Avant 95-01 Service Repair Manual, page 43.

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