Toyota standard diagnostics
BlueDriver Bluetooth Pro
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Toyota Idle Air Control System RPM High
Specialized diagnostic report for Toyota owners dealing with the P0507 fault code.
Technician's Overview
🟡 SERVICE SOONPCM commanded idle RPM is lower than actual idle speed — engine idles faster than target. When this code is triggered in a Toyota, the engine control module (ECM) has detected an issue with the Idle Control system.
Common Symptoms
- High idle — 1,000–2,500 RPM at warm idle when in park in my Toyota
- Engine surges and hunts at idle in my Toyota
- Transmission clunk into Drive — higher than normal idle RPM at stop in my Toyota
Probable Causes
- Vacuum leak (most common) — cracked intake boot, disconnected vacuum line
- Dirty throttle body — carbon buildup preventing blade from seating
- IAC (idle air control) valve stuck open
- Throttle body actuator fault (electronic throttle — DBW vehicles)
Recommended Fixes for Toyota
- Inspect intake boot for cracks, especially near throttle body clamps
- Remove and clean throttle body with throttle body cleaner — do NOT use carburetor cleaner on MAF
- Perform throttle body relearn procedure after cleaning (many GM/Toyota models require it)
- Test IAC valve resistance (spec: 10–14 Ω typical); replace if out of spec
QUICK FIX TOOL
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Toyota advanced data
OBDLink MX+
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