Fuel Injector Group Supply Voltage Circuit Low
The P2153 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 can be caused by a faulty fuel injector driver, damaged wiring, poor electrical connections, or a failing PCM. The low voltage prevents the injectors from opening properly, leading to an overly lean air-fuel mixture and potential engine misfires.
1. Most Common Causes
- Blown fuse in the injector group 'C' power supply circuit
- Open circuit in the 12V power supply wiring to injector group 'C'
- Short to ground in the injector group 'C' power supply circuit
- Corroded, loose, or damaged connectors in the injector harness
- Faulty injector power relay (main relay)
- Defective PCM (internal driver shorted)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Poor acceleration and reduced fuel economy
- Possible hard starting or no-start condition
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P2153 and check for related codes.
Step 2: Visually inspect the fuel injector wiring harness and connectors for damage, corrosion, or loose connections.
Step 3: Test the voltage at the injector supply circuit with a multimeter (should be near battery voltage with key on).
Step 4: Check the fuel injector driver module and related fuses/relays for proper operation.
4. 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 misfires, poor performance, and potential damage to the catalytic converter due to unburned fuel.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the PCM or injector driver module needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.