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 MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 428 (HYBRID/EV CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P16F2CONDITIONS FOR SETTING THE DTC
2009 Chevrolet Tahoe Base, 4.8 C
Conditions for Setting the DTC
2009 Chevrolet Tahoe Base, 4.8 CSECTION Conditions for Setting the DTC
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
Condition 1
- No internal mode switch direction switch DTCs are set.
- A valid internal mode switch direction indicated by the internal mode switch does not match the direction indicated by the hybrid powertrain control module software.
Condition 2
- No internal mode switch direction switch DTCs are set.
- Two valid internal mode switch directions are indicated at the same time.
Condition 3
- One internal mode switch direction switch circuit has failed.
- The hybrid powertrain control module calculates a transmission direction based upon the remaining internal mode switch circuits but it does not match the direction indicated by the hybrid powertrain control module software.
Condition 4
- Multiple internal mode switch directions and one internal mode switch direction switch circuit has failed.
- Based upon the remaining internal mode switch circuits the hybrid powertrain control module calculated two directions at the same time.
Condition 5
- More than one internal mode switch direction circuit has failed and the hybrid powertrain control module cannot calculate a transmission direction.
- Ignition voltage is 9.5-18 V.
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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.