P1599moderate severityPowertrain
Engine Stall or Near Stall Detected
on 2017 GMC Terrain 3.6L V6 · FWD
What this code means
The PCM has the ability to set this code when it detects the engine has stalled or nearly stalled while the ignition is still in the ON/RUN position. This code is typically a secondary code caused by an underlying condition.
Symptoms
- Engine stalling unexpectedly
- Check Engine Light
- Rough or erratic idle leading to stall
- Engine nearly dies at idle
Common causes
- Underlying issue causing stall (vacuum leak, fuel pump, IAC valve)
- Ignition system failure (coils, plugs, wires)
- Sensor failure (MAF, TPS, CKP)
- Fuel delivery problem
- EGR valve stuck open
- Torque converter clutch not releasing
Diagnostic steps
- Check for other DTCs that may indicate root cause
- Test fuel pressure
- Inspect for vacuum leaks
- Test IAC valve operation
- Check ignition system components
- Monitor sensor data for anomalies
Repair notes
This code is usually a result of another underlying problem. Diagnose and repair the root cause first. Common culprits: vacuum leaks, failing fuel pump, faulty IAC valve, ignition problems.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1