P0121

Tests 1 - 3:

Tests 4 - 9:

Tests 10 - 11:

SYMPTOM
P0121 - TPS VOLTAGE DOES NOT AGREE WITH MAP

WHEN MONITORED
With the engine running and no MAP sensor or TP sensor trouble codes.

SET CONDITION
PCM - 2 tests on TPS. High Voltage Test => engine speed low, manifold VAC high (throttle plate nearly closed, TPS output low). Low Voltage Test => road/load speed > 40 kph ( > 25mph), vacuum low (throttle plate open, TPS signal high). If improper TPS voltage, code in 7 sec.

POSSIBLE CAUSES
- MAP sensor trouble code present
- TPS 5-Volt supply circuit open
- TPS connector & terminal corroded, damaged, pushed out or miswired
- TPS harness or connectors intermittent defect
- TPS Voltage above 1.0 Volt
- TPS Voltage above 3.5 Volts
- TPS Voltage change not smooth