GM P1599 Error Code: How to Fix It

Q: What causes GM P1599 error code?

P1599 is typically caused by faulty idle air control valve, dirty mass air flow sensor, low fuel pressure, bad throttle position sensor, or poor engine grounds. It can also result from vacuum leaks or timing issues.

Q: Can I drive with P1599 code?

It's not safe to drive with P1599 as it indicates engine stalling issues. The vehicle may stall unexpectedly, creating dangerous driving conditions. Address the problem immediately.

Q: How much does it cost to fix P1599?

Repair costs vary widely depending on the root cause. Simple fixes like cleaning sensors cost $20-50 in supplies, while replacing fuel pump or major sensors can cost $200-800 including labor.

Q: Will P1599 clear itself?

P1599 will not clear itself until the underlying problem is fixed. The code may temporarily disappear after clearing but will return if the stalling condition persists.

Q: What GM vehicles get P1599 code?

P1599 appears in most GM vehicles from 1996 onwards including Chevrolet, Buick, Cadillac, GMC, Pontiac, and Saturn models with OBD2 systems.

Abstract

GM error code P1599 indicates your engine has experienced a stall or near-stall condition. This code is set when the PCM detects an unexpected loss of engine RPM that could lead to unsafe driving conditions.