The check engine light came on a couple of weeks ago with the code: PO122 (throttle body sensor/switch)
P0122 - Set Condition: Throttle Position Sensor voltage at the PCM is lower than 0.1 of a volt for 1.3 seconds.
TP SENSOR SWEEP
(K7) 5-VOLT SUPPLY CIRCUIT OPEN
(K7) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO GROUND
(K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO (K4) SENSOR GROUND CIRCUIT
TCM INTERNALLY SHORTED THROTTLE POSITION SIGNAL CIRCUIT
Step 1: Overview
Since replacing the TPS I've noticed an increase in MPGs (around a 10-15% increase) as well as better acceleration on hills and while passing.
Step 2: Details, Parts and tools
Cost: $25.00 - $34.99 (AutoZone and Napa both keep these in stock)
Tools needed: Ratchet set with torx sockets/bits and a strong thumb
Time: 25 minutes
Prep: Disconnect the battery. It's is recommended that you always disconnect the battery when doing any kind of work on the electrical systems of any vehicle. You also might want to wait for your engine to cool down if you have been driving the vehicle recently, unless you like getting burnt.