Fuel Injector Group Supply Voltage Circuit High
The P2154 code indicates that the powertrain control module (PCM) has detected a voltage level in the fuel injector group supply circuit that is higher than the specified range. This circuit provides power to a group of fuel injectors, typically through a fuse or relay. A high voltage condition can be caused by a short to voltage, a faulty injector driver, or a malfunctioning PCM. This can lead to excessive fuel delivery, causing rich running conditions, poor fuel economy, and potential engine damage.
01. Most Common Causes
- Short to voltage in the injector supply circuit
- Faulty fuel injector driver module
- Corroded or damaged wiring/connectors
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Poor fuel economy
- Black smoke from exhaust (rich condition)
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the injector supply wiring and connectors for damage or corrosion.
Step 3: Use a multimeter to check voltage at the injector group supply circuit (should be battery voltage with key on).
Step 4: Test the injector driver module or PCM output for proper operation.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause engine damage due to excessive fuel delivery. Have the vehicle inspected immediately.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on the cause (wiring repair vs. module replacement).