P0121

Test 1:

Tests 2 - 6:

Tests 7 - 11:

Tests 12 - 15:

Tests 16 - 18:

SYMPTOM
P0121-TPS VOLTAGE DOES NOT AGREE WITH MAP

WHEN MONITORED
With the engine running and no MAP Sensor or TP Sensor DTC's set.

SET CONDITION
When the manifold vacuum is low, the TP sensor signal should be high. Conversely, when manifold vacuum is high, the TP sensor signal should be low. If the MAP Sensor and TP Sensor do not respond within 4 seconds as stated above, a DTC will be set.

POSSIBLE CAUSES
- Intermittent Condition
- High Resistance In 5 Volt Supply Circuit
- Resistance To Ground In 5 Volt Supply Circuit
- MAP Sensor
- High Resistance In Map Sensor Signal Circuit
- Resistance To Ground In Map Sensor Signal Circuit
- High Resistance In Sensor Ground Circuit
- PCM
- High Resistance In 5 Volt Supply Circuit
- Resistance To Ground In 5 Volt Supply Circuit
- TP Sensor
- High Resistance In TP Sensor Signal Circuit
- Resistance To Ground In Throttle Position Sensor Signal Circuit
- High Resistance In Sensor Ground Circuit
- PCM