P0121

Test 1:

Test 2 - 6:

Test 7 - 11:

Test 12 - 13:

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
- Good trip equal to zero
- High resistance in (K6) 5-volt supply circuit
- (K6) 5-volt supply circuit shorted to ground
- MAP sensor
- High resistance in the (K1) MAP sensor signal circuit
- (K1) MAP sensor signal circuit shorted to ground
- High resistance in (K4) sensor ground circuit
- TP sensor operation
- High resistance in (K6) 5-voltsupply circuit
- (K6) 5-volt supply circuit shorted to ground
- TP sensor
- PCM