📖 What Does P0591 Mean?
Symptoms
- • Rough idle
- • stalling
- • hesitation when accelerating
- • engine light on
Common Causes
- • Faulty idle air control (IAC) motor
- • dirty or clogged IAC motor
- • faulty throttle position sensor
- • vacuum leaks
Possible Solutions
1. Check and clean the IAC motor and its associated vacuum hoses. 2. Replace the IAC motor if it's faulty. 3. Check and replace the throttle position sensor if it's faulty. 4. Check for vacuum leaks and repair as necessary.
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❓ Common Questions About P0591
Can I drive with code P0591?
You can drive for a short time, but should address code P0591 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix P0591?
The estimated repair cost for code P0591 is between $100 and $300. This includes parts and labor for most makes and models.
Is this code easy to fix myself?
This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.
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View Best Sellers ↗Related Diagnostic Codes
Other codes that may appear with P0591
P0589: Idle Air Control (IAC) Motor Circuit Malfunction
P0590: Idle Air Control (IAC) Motor Circuit Malfunction
P0592: Idle Air Control (IAC) Motor Circuit Malfunction
P0593: Idle Air Control (IAC) Motor Circuit Malfunction
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system