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P2607 is a diagnostic trouble code (DTC) for "Intake Air Heater 'B' Circulation Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P2607 trouble code is a generic powertrain code related to computer circuit output issues. Your vehicle’s engine control module (ECM) is receiving a notification that the second intake air heater (heater B or 2) is presenting a low voltage reading or is exceeding the manufacturer’s allowed variances.
The P2607 code is also related to:
When a P2607 code comes up, your vehicle’s air intake heater B (number 2 intake heater circuit) is not receiving the correct voltage. An intake air heater system works to warm the cooler air coming into the intake system.
The resistance between the signal and return posts of the air intake heater relay should be between 15 and 25 ohms. The resistance of the air intake heater relay signal circuit between the vehicle’s ECM and the intake air heater relay connector should have a resistance less than 10 ohms. If the ECM detects resistance levels lower than these readings, a P2607 code will appear.
Symptoms of a P2607 trouble code may include:
To diagnose a P2607 code, a mechanic may do one or more of the following:
Use an OBD-II scanner to check for a stored P2607 trouble code
Perform a visual inspection
Check for damaged or defective wires
Check battery wires for damage or loose connections
Check for any loose electrical connectors or bent pins
Check for any grounded wires
Connect vehicle to scanner and check if the ECM is commanding the intake air heater to turn on
Listen to hear if the blower is working
Locate heater element and use an infrared thermometer to check if it is warming
Measure resistance between signal and return posts of the intake air heater relay
Measure resistance of the intake air heater relay signal circuit between the vehicle’s ECM connector and the intake air heater relay connector
Measure the voltage between the signal circuit of the intake air heater and battery negative
Check circuit continuity
Clear the code and test drive the vehicle to see it reappears (with some makes and models, it requires a few drive cycles with a failure to turn on a warning light)
Note: Some vehicle models will allow the mechanic to turn a vehicle’s air intake heater on and off, which is helpful for testing this issue after an engine is warm.
Because the vehicle may not show any symptoms for this code except a warning light or failed smog test, but could potentially stall or hesitate at idle causing dangerous driving conditions, YourMechanic considers the P2607 code serious and recommends to take your vehicle to your local service center or mechanic immediately for diagnosis and repair.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.