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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 286 (HYBRID ENGINE CONTROLS - DTC P181C TO DTC P2792)DTC P1B0F OR P1B10CIRCUIT/SYSTEM VERIFICATION
2009 Chevrolet Tahoe Base, 4.8 C
Circuit/System Verification
2009 Chevrolet Tahoe Base, 4.8 CSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2010 GMC Yukon, 2010 Chevrolet Tahoe, and 2010 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- Observe the BECM Contactor Sys. Req. Signal parameter. The HV contactor relays should be Closed, enabling the high voltage system.
- If the HV contactor relays are Open, diagnose and repair the DTCs which are preventing high voltage from being enabled.
- Ignition OFF, wait 2 minutes.
- Ignition ON, wait 2 minutes and then turn ignition OFF.
- Ignition ON, monitor DTC Status. DTC P1B10 and P1B0F should have passed last test.
- If the DTC has passed, clear DTC Information. No further diagnosis of this DTC is necessary.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.