Circuit Description

The TPS is variable resistor that monitors throttle opening. The ECM determines vehicle driving condition and adjusts air/fuel mixture accordingly. Code is set when ECM detects open or short in TPS circuit. Possible causes are:

TPS open or short circuit.
TPS malfunction.
ECM.

NOTE: If Codes 22, 24, 31 and 41 are output together, inspect ECM terminal E2 (ground) circuit. Repair as needed. See wiring diagram in the WIRING DIAGRAMS article.