Circuit Description

WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.

Powertrain Control Module (PCM) monitors Camshaft Position (CMP) sensor and Crankshaft Position (CKP) sensor to detect if engine is misfiring. PCM looks for a sudden drop in crankshaft speed. This test is executed in blocks of 100 camshaft revolution tests. It may take several tests to set a DTC. Under light misfire conditions, it may take more than one trip to set a DTC. Severe misfire will flash Malfunction Indicator Light (MIL), indicating catalytic converter damage is possible.

Conditions for setting this DTC are:

DTCs P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0171, P0172, P0325, P0335, P0341, P0342, P0404, P0405, P0502, P0503, P0506, P0507, P0601, P0740, P0742, P1133, P1404 and P1621 not set.
Misfire total is greater than 12 counts.
Engine speed is 469-6000 RPM.
Battery voltage is 9-17 volts.
ECT 20-254°F (-7 to 123°C).
Engine run time greater than 15 seconds.
TP sensor angle has not changed greater than 8 percent in one second.