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DTC P0120 - THROTTLE POSITION (TP) SENSOR Nissan 200SX S14

Testing & Diagnostics ~190 words
  1. Check Ground Circuit Turn ignition switch to OFF position. Loosen and retighten engine ground screws. Disconnect TP sensor harness connector. Using an ohmmeter, check continuity between TP sensor harness connector terminal No. 3 (Black wire) and engine ground. If no continuity exists, repair open in Black wire. If continuity exists, go to next step.
  2. Check Power Supply Turn ignition switch to ON position. Using a voltmeter, measure voltage between TP sensor harness connector terminal No. 1 (Pink/Blue wire) and ground. If voltage is not approximately 5 volts, repair fault in Pink/Blue wire. If voltage is approximately 5 volts, go to next step.
  3. Check Input Signal Circuit Turn ignition switch to OFF position. Disconnect ECM harness connector. Using an ohmmeter, check continuity between ECM harness connector terminal No. 23 and TP sensor harness connector terminal No. 2 (Yellow wire). If no continuity exists, repair open in Yellow wire. If continuity exists, go to next step.
  4. Check Component Inspect TP sensor. See the «SYSTEM/COMPONENT TESTS - 2.0L»(ref-17821) article. Replace TP sensor as required. Disconnect and reconnect harness connectors in circuit and perform «FINAL CHECK»(ref-17820-S16658626442000122900000) .

More articles — Engine Controls - Tests W/codes - 2.0L