P2157 Fault Code

Fuel Injector Group D Supply Voltage Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2157 fault code indicates that there is an issue with the supply voltage circuit of the fuel injector group D. This means that the voltage supplied to the fuel injectors in this group is higher than the expected range. This situation can lead to poor engine performance, increased fuel consumption, and potential damage to the fuel injectors.

What are the symptoms of the P2157 code?

Some common symptoms associated with the P2157 fault code may include:

• Engine misfires or rough idling.
• Decreased fuel efficiency while driving.
• Hesitation or stalling during acceleration.
• Illuminated check engine light on the dashboard.
• Poor throttle response or sluggish performance.

What causes the P2157 code?

Several factors can contribute to a high supply voltage in the fuel injector circuit, including:

• Short circuits within the wiring harness.
• Faulty fuel injectors that are drawing excess voltage.
• Malfunctioning engine control module (ECM) or powertrain control module (PCM).
• Poor electrical connections or corroded terminals.
• Issues with the ignition system that affects sensor readings.

How to fix P2157?

To resolve the P2157 fault code, follow these steps:

• Inspect the wiring and connectors related to the fuel injector group D for signs of damage, wear, or corrosion.
• Test the fuel injectors in group D for proper operation and electrical resistance.
• Check the ECM or PCM for any stored or pending error codes and reprogram if necessary.
• Repair any wiring issues or replace faulty components as needed.
• Clear the codes from the system and test drive the vehicle to ensure the issue has been resolved.