Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 924 (HYBRID/EV CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P16F4CONDITIONS FOR SETTING THE DTC
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Conditions for Setting the DTC
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Conditions for Setting the DTC
WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
Condition 1
The transmission direction, indicated by both the internal mode range and direction switch circuits, are valid but do not match.
Condition 2
- One internal mode range direction switch circuit has failed.
- The hybrid powertrain control module calculates a transmission direction base upon the remaining internal mode range direction circuits.
- The calculated hybrid powertrain control module transmission direction does not match the direction indicated by the internal mode range switch circuits.
Condition 3
- One internal mode range direction switch circuit has failed.
- The hybrid powertrain control module calculates a transmission direction based upon the remaining internal mode range direction circuits.
- The internal mode range switch indicated a transitional position.
Condition 4
- One internal mode range direction switch circuit has failed.
- The hybrid powertrain control module calculates a transmission direction based upon the remaining internal mode range direction circuits.
- The TCM has indicated at least one internal mode range switch circuit has failed.
Condition 5
- More than one internal mode range direction circuit has failed and the hybrid powertrain control module cannot calculate a transmission direction.
- The internal mode range switch indicates a transitional position.
Condition 6
- More than one internal mode range direction circuit has failed and the hybrid powertrain control module cannot calculate a transmission direction.
- The TCM has indicated at least one internal mode range switch circuit has failed.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.