fuel injector output driver circuit performance bank 1

Throttle position sensor input above or below acceptable voltage. Intake air temperature sensor input above or below acceptable voltage.

Left oxygen sensor input voltage maintained above the normal operating temperature.Įngine coolant temperature sensor above or below acceptable voltage. Oxygen sensor voltage too low, tested after cold start. Upstream oxygen sensor heating element circuit malfunction.ĭownstream oxygen sensor heating element circuit malfunction.ĭownstream oxygen sensor input voltage maintained above the normal operating range. Upstream oxygen sensor response slower than minimum required switching frequency. No vehicle speed sensor signal detected during driving load conditions.Įngine did not reach operating temperature within acceptable limits MAP sensor input above or below acceptable voltage. No difference recognized between the engine MAP reading and the barometric (atmosphere) pressure reading from start-up. Positive battery input to PCM was disconnected within the last 50 Key-on cycles. Intermittent loss of either camshaft or crankshaft position sensor. No crank reference signal detected during engine cranking. If more than one code is stored, there will be a longer pause before the next code is displayed. DTC 24 will be displayed by 2 flashes, short pause, and then 4 more flashes.

Record the 2-digit DTC as displayed by the flashing MIL.

Turn the ignition On-Off-On-Off-On within 5 seconds.

This method is used to retrieve OBD I and OBD II diagnostic trouble codes from your YJ, TJ, XJ, ZJ, and early WJ Jeep models.

Fuel injector output driver circuit performance bank 1