DTC Parameters

DTC will set if the throttle has not been learned after the ECM has been reprogrammed; or the learned lower rest position TP values are too far out of range from the stored learned values when:

• During a once per key-up close throttle test.
• Engine speed is less than 250 RPM.
• Vehicle speed is zero MPH.
• ECT is between 41-212°F (5-100°C).
• IAT is greater than 41°F (5°C).
• Accelerator pedal angle is less than 15 percent.
• Battery voltage is more than 10 volts.

DTC P1526 diagnostic runs during a key-up closed throttle test when the above conditions have been met.