P1511

Schematic:

Limp-home is a reduced power condition the vehicle enters after certain faults. In this drive mode, throttle position is limited to 3.7-9.8 percent. This DTC will set if the TP should fall below 3.7 percent or open more than 9.8 percent while the vehicle is in limp-home mode. This code results in fuel cut-off and the engine will not start again.

DTC PARAMETERS
This code will set when:
^ TP less than 3.7% or TP greater than 9.8%
^ Vehicle Speed zero mph
^ Engine Speed less than 250 rpm
^ ECT is between 5°C (41°F) and 100°C (212°F)
^ IAT greater than 5°C (41°F)
^ Battery Voltage greater than 10 volts
^ Pedal Position less than 15%

DTC P1511 is a (type A) DTC.

DIAGNOSTIC AIDS
Possible causes:
^ Weakened springs in throttle assembly
^ Throttle butterfly forced to extreme position by surge of air, carbon deposits
^ Circuit failure to throttle motor
^ Throttle position sensor not functioning properly (check for TP DTCs)
^ Throttle body