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DTC P1381 & P1382: CYP Sensor

NOTE: DTC P1381 indicates intermittent interruption in Cylinder Position (CYP) sensor circuit. DTC P1382 indicates no signal in CYP sensor circuit.
  1. Perform PCM reset procedure. See PCM RESET PROCEDURE/CLEARING DTCS  . Start engine. If DTCs P1381 and/or P1382 are present, go to next step. If DTCs P1381 and/or P1382 are not present, problem is intermittent, system is okay at this time. Check for poor connections or loose wires at 14-pin connector (located at right shock tower), CYP connector and PCM. See the WIRING DIAGRAMS article.
  2. Turn ignition off. Disconnect distributor 5-pin connector. Measure resistance between sensor terminal No. 4 (CYPP) and terminal No. 5 (CYPM). See Fig 1 . If resistance is 800-1500 ohms, go to next step. If resistance is not as specified, replace distributor ignition housing.
  3. Check for continuity between ground and CYP sensor terminal No. 2 and terminal No. 4, individually. See Fig 1 . If continuity does not exist, go to next step. If continuity exists, replace distributor ignition housing.
  4. Reconnect distributor 4-pin or 5-pin connector. Disconnect PCM 31-pin connector "C". See Figure . Measure resistance between PCM connector terminal C4 and terminal C14. If resistance is 800-1500 ohms, go to next step. If resistance is not as specified, repair open in suspect wire(s) between distributor and PCM. See the WIRING DIAGRAMS article.
  5. Check for continuity between ground and PCM 31-pin connector "C" terminal C4. If continuity exists, repair short in wire between distributor and PCM. See the WIRING DIAGRAMS article. If continuity does not exist, substitute a known-good PCM and recheck. If symptom or problem goes away, replace original PCM.
    Fig 1: CYP Sensor Connector
    G96G09598Courtesy of AMERICAN HONDA MOTOR CO., INC.
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