DTC P0122: TP Sensor Circuit Low Voltage
- Turn the ignition switch ON(II).
- Check the throttle position with the scan tool.
Is there about 10% or 0.5 V when the throttle is fully closed and about 90% or 4.5 V when the throttle is fully opened?
YES - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the TP sensor and at the ECM.
NO - Go to step 3.
- Turn the ignition switch OFF.
- Disconnect the TP sensor 3P connector.
- Turn the ignition switch ON (II).
- Measure voltage between the TP sensor 3P connector terminals No. 1 and No. 3.
TP SENSOR 3P CONNECTOR
Wire side of female terminals
Is there about 5 V?
YES - Go to step 7.
NO - Go to step 14.
- Turn the ignition switch OFF.
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- At the sensor side, measure resistance between the TP sensor 3P connector terminals No. 1 and No. 2 with the throttle fully closed.
TP SENSOR 3P CONNECTOR
Terminals side of male terminals
Is there about 0.5 - 0.9 kohms?
YES - Go to step 9.
NO - Replace the throttle body.
- Measure resistance between the TP sensor 3P connector terminals No. 2 and No. 3 with the throttle fully closed.
TP SENSOR 3P CONNECTOR
Terminals side of male terminals
Is there about 4.5kohms?
YES - Go to step 10.
NO - Replace the throttle body.
- Disconnect ECM connector A (31P).
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