Fuel Injector Group Supply Voltage Circuit Low
The P2150 code indicates that the powertrain control module (PCM) has detected a low voltage condition in the supply circuit for a group of fuel injectors. This circuit provides power to the injectors, and a low voltage can cause improper fuel delivery, leading to engine performance issues. The problem may be due to a faulty injector driver, wiring issues, or a weak battery/charging system.
01. Most Common Causes
- Faulty fuel injector driver module
- Damaged or corroded wiring/connectors in the injector supply circuit
- Weak battery or failing alternator
- Blown fuse or open circuit in the injector power supply
02. Symptoms You Will Notice
- Engine misfire or rough idle
- Check Engine Light illuminated
- Poor fuel economy
- Hard starting or stalling
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and check freeze frame data.
Step 2: Inspect the fuel injector supply circuit wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the voltage at the injector supply circuit with a multimeter; compare to manufacturer specifications.
Step 4: Check the battery voltage and alternator output to ensure proper charging system operation.
Step 5: If wiring and power supply are okay, test the injector driver module or PCM for faults.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as low voltage can cause poor engine performance and potential stalling. Immediate diagnosis is advised.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the root cause and labor rates.