OBD-II Code P2003: Intake Manifold Runner Control Circuit/Open (Bank 1) – Causes, Fixes & How iCarsoft Helps
When your car shows a P2003 code, it means the Powertrain Control Module (PCM) has detected an electrical fault (circuit malfunction or open circuit) in the Intake Manifold Runner Control (IMRC) solenoid circuit for engine Bank 1. This often triggers the check engine light and may lead to reduced engine power and poor fuel efficiency. In this guide, we’ll explain what P2003 means, how to fix it, and why using the iCarsoft CR Max makes diagnosis faster and more accurate.
❓ What does code P2003 mean?
Answer: P2003 is a generic OBD-II code indicating a problem with the electrical circuit controlling the Intake Manifold Runner (IMR) on Bank 1 of the engine. The IMRC system optimizes airflow into the engine for better performance and efficiency; a fault can disrupt this function.
Evidence: According to SAE J2012 standards, P2003 specifically points to a "Intake Manifold Runner Control Circuit/Open (Bank 1)".
❓ What causes code P2003?
- Faulty Intake Manifold Runner Control (IMRC) solenoid
- Open or shorted wiring in the IMRC solenoid circuit
- Poor electrical connection at the IMRC solenoid or PCM
- Failed PCM (rare)
⚡ Common Causes & Repair Costs
| Cause | Estimated Repair Cost (USD) |
|---|---|
| Replace IMRC solenoid | $150 – $400 |
| Repair wiring harness | $200 – $500 |
| Clean or repair electrical connections | $100 – $250 |
| PCM replacement/reprogramming | $800 – $1200 |
🔧 How iCarsoft CR Max Helps Diagnose P2003
The iCarsoft CR Max scanner can:
- Read and clear the P2003 code and any other related codes
- Perform active tests to command the IMRC solenoid on/off
- Display live data to monitor IMRC solenoid operation and feedback signals
- Access manufacturer-specific codes and data for precise diagnosis
Pro tip: Use the live data function to monitor the IMRC solenoid status while gently wiggling the wiring harness. This can help identify an intermittent open circuit.
❓ FAQ: Code P2003
Q: Can I drive with code P2003?
A: While the car may still run, you might experience reduced power and fuel economy. It's best to address the issue promptly to avoid potential further damage.
Q: Will a simple fix solve P2003?
A: Often, yes. The issue is frequently a faulty solenoid or a damaged wire, which are relatively straightforward repairs for a professional technician.
