Electronic Throttle Control — Throttle Return / Closed-Position Performance (GM; a sticking or carboned throttle body)
The P1523 code means the vehicle's onboard diagnostic system has detected: Electronic Throttle Control — Throttle Return / Closed-Position Performance (GM; a sticking or carboned throttle body). This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- Varies — depends on the specific component this manufacturer-specific code points to on your vehicle. Diagnose before buying parts.
Manufacturer-specific code. P1523 is a manufacturer-specific DTC, so its exact definition can differ by make, model, and year. Use the meaning above as a general guide, and always confirm it against your vehicle manufacturer's official service information (or a make-specific scan tool) before diagnosing or replacing parts.
What Are the Symptoms of P1523?
- Check Engine or a related warning light on
- Exact symptoms depend on the specific system this code covers for your make
- A make-specific scan reveals which subsystem and circuit is involved
What Causes P1523? (Most Likely First)
- A fault in the specific component or circuit this code monitors (the exact part varies by manufacturer) High
- Damaged wiring, a corroded connector, or a poor ground in that circuit Moderate
- A related sensor or control module reporting or causing the fault Moderate
Can I Still Drive with P1523?
Short distances only. P1523 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
Does P1523 mean the same thing on every vehicle?
No. P1523 is a manufacturer-specific diagnostic trouble code, so its exact meaning varies by make, model, and year. Always confirm it against your vehicle manufacturer's service information before diagnosing or replacing parts.
What does P1523 most likely indicate?
Electronic Throttle Control — Throttle Return / Closed-Position Performance (GM; a sticking or carboned throttle body). Treat this as a general guide and verify the specifics for your vehicle.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P1523?
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Confirm your exact make, model, and year first — P1523 is manufacturer-specific and can mean different things across brands.
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Read P1523 with an enhanced/make-specific scan tool and check your manufacturer's official service information for the precise definition and procedure.
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Inspect the wiring, connectors, and grounds for the indicated circuit before replacing any part.
P1523 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
Which Vehicles Commonly Get P1523?
- 2003-2007 Chevrolet Silverado
- 2003-2007 GMC Sierra
- 2005-2009 Chevrolet Trailblazer
- 2006-2010 Chevrolet Impala
- 2007-2013 Chevrolet Tahoe
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