Error code
OBD2 P0640
OBD2P0640
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Intake Air Heater Control Circuit.
Severity
moderateCan drive but may experience reduced performance or increased emissions.
Summary
P0640 indicates an issue with the intake air heater control circuit, which is part of the engine's electrical system.
Common Causes
- Wiring issues
- Faulty relay
- Intake air heater malfunction
Fixes
- Repairing wiring, replacing faulty relay or intake air heater
FAQ
What does P0640 mean?
P0640 indicates a malfunction in the circuit controlling the intake air heater.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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