What Does P2606 Mean?
The PCM has detected that intake air heater B is not performing within expected parameters. The heater circuit shows abnormal current draw or resistance values outside specifications.
Common Causes
35%
Partially failed intake air heater B element with incorrect resistance
25%
High resistance connections at intake air heater B terminals
20%
Damaged wiring causing intermittent connection to heater B
12%
Faulty intake air heater B relay or control module
8%
Insufficient voltage supply due to battery or charging issues
Diagnostic Steps
1
Step 1: Measure current draw of intake air heater B during operation with amp clamp (compare to specifications)
2
Step 2: Test resistance of heater B element with ignition off and connector disconnected
3
Step 3: Inspect heater B connector for corrosion, looseness, bent pins, or overheating damage
4
Step 4: Monitor voltage at heater B during activation cycle with multimeter
5
Step 5: Test ground circuit resistance from heater B to battery negative terminal
Estimated Repair Cost
$200 - $550
Parts + labor, varies by vehicle and location
The PCM has detected that intake air heater B is not performing within expected parameters. The heater circuit shows abnormal current draw or resistance values outside specifications.
The most common cause of P2606 (Intake Air Heater "B" Circuit Range/Performance) is: Partially failed intake air heater B element with incorrect resistance
Typical repair costs for P2606 range from $200 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Reduced cold start performance and possible white smoke on startup. Vehicle remains safe to operate but may be difficult to start in freezing temperatures.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2606 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
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.
