What Does P2605 Mean?
The PCM has detected an open circuit or electrical disconnection in the Bank 2 intake air heater circuit. The heater is not receiving power or ground, or the heating element has failed open.
Common Causes
35%
Failed intake air heater B with open heating element
25%
Broken or disconnected wiring to intake air heater B
20%
Corroded or damaged connector at intake air heater B
12%
Blown fuse or failed relay for intake air heater B circuit
8%
Open ground circuit for intake air heater B
Diagnostic Steps
1
Step 1: Visually inspect intake air heater B and all associated wiring for obvious damage or disconnection
2
Step 2: Check fuses and relays associated with intake air heater B circuit
3
Step 3: Disconnect heater B connector and measure resistance across heater terminals (should read 0.3-2.0 ohms typically)
4
Step 4: Check for voltage at heater connector with heater commanded on (should see battery voltage)
5
Step 5: Verify ground circuit continuity from heater to chassis ground with ohmmeter
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or electrical disconnection in the Bank 2 intake air heater circuit. The heater is not receiving power or ground, or the heating element has failed open.
The most common cause of P2605 (Intake Air Heater "B" Circuit/Open) is: Failed intake air heater B with open heating element
Typical repair costs for P2605 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Difficult cold starts and increased emissions during warm-up. Vehicle is safe to drive but may experience hard starting in cold weather.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2605 to identify the root cause.
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Quick Info
Category
Powertrain
System
Intake Air Heating System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
