Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means the car's cooling fan is running all the time and won't turn off.
The code indicates that the vehicle's onboard computer has detected that the cooling fan for the engine is constantly running, even when it shouldn't be.
P2B30 is a diagnostic trouble code indicating that the Engine Control Module (ECM) has detected that Fan 1 is continuously operating. This could be due to a malfunction in the fan relay, wiring, or the fan control module itself.
• Cooling fan runs continuously
• Battery drain
• Engine running cooler than normal
• Faulty fan relay
• Short circuit in wiring
• Defective fan control module
ECM: Engine Control Module
Relay: An electrical switch that opens and closes under the control of another electrical circuit
• Check the fan relay for faults.
• Inspect wiring for shorts or damage.
• Test the fan control module for proper operation.
• Replace the faulty fan relay.
• Repair or replace damaged wiring.
• Replace the fan control module if defective.
• Multimeter
• Relay tester
• Screwdriver set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford Focus
• Regularly inspect fan relays and wiring.
• Ensure proper maintenance of cooling system.
• Check for software updates for the ECM.
Engine Performance
• Do not ignore the issue as it can lead to battery drain.
• Seek professional diagnosis to avoid misdiagnosis.
• Consider regular maintenance checks to prevent recurrence.
Check with your vehicle manufacturer for warranty coverage on cooling system components.
This code has been associated with faulty relays and wiring issues in certain vehicle models.
Moderate – While the vehicle is still drivable, prolonged issues can lead to battery drain.
Ensure repairs are conducted by a qualified technician to avoid safety hazards.
• Engine at operating temperature
• Vehicle parked with ignition on
The cooling fan is located at the front of the engine bay, behind the radiator.
Q: Can I drive with the P2B30 code?
A: Yes, but it's not recommended for long periods as it can drain the battery.
Q: How do I reset the P2B30 code?
A: Fix the underlying issue and use an OBD-II scanner to clear the code.
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