P2604 Dodge Code - Intake Air Heater 'A' Circuit Range/Performance
Quick Answer
The Engine Control Module (ECM) uses an Intake Air Heater (IAH) to warm the incoming air for proper cylinder combustion. Common causes include Faulty Intake Air Heater (IAH) Relay, Faulty Intake Air Heater, Intake Air Heater Relay harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2604 Dodge indicates Intake Air Heater 'A' Circuit Range/Performance .
- Common causes
- Common causes include Faulty Intake Air Heater (IAH) Relay, Faulty Intake Air Heater, Intake Air Heater Relay harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P2604 Dodge Description
What are the Possible Causes of the DTC P2604 Dodge?
- Faulty Intake Air Heater (IAH) Relay
- Faulty Intake Air Heater
- Intake Air Heater Relay harness is open or shorted
- Intake Air Heater Relay circuit poor electrical connection
- Intake Air Heater harness is open or shorted
- Intake Air Heater circuit poor electrical connection
How to Fix the DTC P2604 Dodge?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2604 Dodge code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P2604 Dodge Code
1. What does the OBDII code P2604 mean on a Dodge vehicle?
P2604 indicates an issue with the Intake Air Heater 'A' Circuit's range or performance, meaning the air heater system isn't functioning as expected.
2. What are the common symptoms of code P2604 in a Dodge?
Symptoms may include difficulty starting the engine in cold weather, poor fuel efficiency, and the Check Engine Light being illuminated.
3. What causes the P2604 code to appear on a Dodge?
Common causes include a faulty intake air heater, damaged wiring or connectors, a failed relay, or issues with the engine control module (ECM).
4. Can I drive my Dodge with the P2604 code active?
While the vehicle may still be drivable, it may struggle to start in cold weather and could experience reduced performance. Prompt diagnosis and repair are recommended.
5. How do I diagnose the P2604 code on a Dodge?
Start by inspecting the intake air heater, wiring, and connectors for damage. Use a multimeter to check circuit continuity and test the heater relay.
6. How is the P2604 code fixed on a Dodge vehicle?
Repairs may involve replacing the intake air heater, repairing damaged wiring, replacing a faulty relay, or, in rare cases, reprogramming or replacing the ECM.
7. How much does it cost to repair the P2604 code on a Dodge?
Repair costs can vary depending on the issue, ranging from $100–$500, with higher costs if ECM replacement is required.
8. Can a dirty or clogged intake affect the P2604 code?
Yes, if the intake system is clogged or dirty, it could impact airflow and heater performance, potentially contributing to the code.
9. What tools are needed to troubleshoot the P2604 code on a Dodge?
Tools typically include a scan tool for reading codes, a multimeter for testing electrical circuits, and basic hand tools for inspecting components.
10. Will replacing the air heater always fix the P2604 code on a Dodge?
Not necessarily. The issue could also stem from wiring, relays, or ECM malfunctions, so proper diagnosis is essential before replacing parts.
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