DTC P083: 24X Reference Signal High: Actions
PCM turns on the "SERVICE ENGINE SOON" MIL.
NOTE:
Numbers in list refer to circled numbers in diagnostic flow charts, see Fig 1and Fig 2
. For circuit identification see Fig 3.
- Checking if Code P035 is set because a REF LO problem can cause other ignition problems.
- If the engine stalls, the problem is with crankshaft position "B" sensor because the engine will remain running with only one crankshaft sensor.
- Checking crankshaft position "B" sensor and circuitry for opens or shorts. The correct resistance should be between 800 Ohms and 1600 Ohms.
- Checking if CKT 1729 or CKT 1730 is shorted to ground. If CKT is shorted to ground it will measure less than 100 Ohms.
- If the sensor is able to produce a DC voltage greater than 0.25 volt the sensor is OK.
- If engine stalls, the problem is with crankshaft position "A" sensor. If the engine remains running, the ignition control module or CKT 647 are shorted high.
- Checking crankshaft position "A" sensor and circuitry for opens or shorts. The correct resistance should be between 800 ohms and 1600 ohms.
- Checking if CKT 1727 or CKT 1728 is shorted to ground. If the CKT is shorted to ground it will measure less than 100 ohms.
- If the sensor is able to produce a DC voltage greater than 0.25 volt the sensor is OK.
- Checking if CKT 647 is shorted high or if the ICM is keeping it high. If you measure greater than 0 Hz the ICM and CKT 647 is OK, the fault is intermittent.