Diagnostic Aids

Check for and repair the following condition(s):

• Throttle plate sticking or excessive deposits on throttle plate or throttle bore.
• Check TP sensor harness connector terminals for damage.
• A steady throttle movement from a stop should cause TP ANGLE value reading on scan tool to increase smoothly as throttle is opened.

Check for faulty connections or damaged harness. Ensure harness is not routed too close to high voltage wires, such as spark plug cables. If connections and harness appear okay, observe ECT display on scan tool while moving all related harnesses and connectors. A change in scan tool display indicates fault location. Check for skewed MAP signal or faulty MAP sensor by comparing scan tool values of a known-good similar vehicle.