What does code P0507 mean on a Buick and is it safe to drive?
P0507: Idle Air Control System RPM Higher Than Expected. Here's what it means on your Buick, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
Idle speed is higher than the PCM expects. Often caused by a vacuum leak or dirty IAC valve.
Common causes for your Buick
- Vacuum leak
- Dirty or faulty idle air control valve
- Throttle body carbon buildup
Symptoms
- High idle
- Check Engine Light
- Possible surging
Typical fixes
- Find and fix vacuum leaks
- Clean or replace IAC valve
- Clean throttle body
Repair cost range
For a Buick, repairs for P0507 often fall between $50 and $400, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Buick
Buick P0507 high idle is caused by the same GM electronic throttle body carbon buildup seen in Chevrolet and GMC. Clean the throttle bore and perform the accelerator pedal position sensor reset. On Encore 1.4T turbo, also check for a boost leak past the intercooler hose.
Most commonly affected models
Enclave 3.6L 2008–2017Regal 2.0T 2011–2017Encore 1.4T 2013–2019