Diagnostic Aids

WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 Chevrolet Suburban, and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Inspect wiring for poor connections at PCM and at transmission in-line 20-way harness connector. Check for bent, backed out or broken terminals, or misaligned connectors. Check for weak terminal tension. Check for chafed wires that could short to bare metal or other wiring. Check for broken wires inside their insulation. Check for moisture and corrosion. If diagnosing for intermittent short or open conditions, move wiring harness while observing scan tool for value changes.

DTC P0218 may set approximately 600 seconds (10 minutes) after DTC P0711 has set. Follow the diagnostic procedure for DTC P0711 before proceeding to the diagnostic procedure for DTC P0218.

DTC P0711 defaults to an elevated line pressure condition which may result in TCC partial apply. This may induce idle surge and engine stall.