![]() Check for broken wire, loose connection.Most drivers don’t know about all dashboard warning symbols and often it was very frustrating for the drivers to what to do in case of dashboard light turns on, especially on a road trip with no immediate help, therefore a driver should have a knowledge of all symbols and lights on a dashboard to better understand about the best possible action. However, excess tar in the vaporizer could migrate downstream and affect other components.Į- 44 Atmospheric Pressure sensor. Verify with the ignition switch “On” only, is LPG fuel pressure holding or draining? While running, check Air/Fuel Alpha display and 02 sensor voltage display. The ECM has usually seen a “full rich” or “full lean” condition. This fault is related to the broad scope of fuel mixture. The ECM has usually seen a “full rich” or “full lean” condition.Į- 43 LPG Air/fuel Ratio malfunction. (On L01/L02 models - Place foot on brake pedal and hold down when clearing fault code.)Į- 42 Gasoline Air/fuel Ratio malfunction. Verify that Stop Lamp Switch is adjusted properly. All trucks have a Stop Lamp Switch even if there are no tail light assemblies. (This fault is not seen.)Į- 41 Stop Lamp Switch malfunction. This sensor is monitored by the Meter Panel. Start at the vaporizer.Į- 40 Oil Pressure sensor. Check for broken wire, loose connection.Į- 38 LPG Vaporizer malfunction. Check 5 amp fuse on the injector holder assembly.Į- 36 LPG Fuel Pressure sensor. When unplugged, it should post no error code. (B) fault stays with original position - bad spark plug or bad ECM.Į- 35 LPG Fuel Injection circuit malfunction. Verify 12 volts on green wire at each coil. Coolant temp sensor has seen 275° or higher.Į- 34 Ignition Signal circuit malfunction. Possible causes: (1) radiator dirty (2) pushing pallets (3) inching pedal not adjusted properly.Į- 33 Engine Coolant over heat (step 2). Coolant temp sensor has seen 230° or higher. Check for corrosion at ETC relay, or water in the relay box.Į- 32 Engine Coolant over heat (step 1). If code follows to the known good truck, replace the ECM.Į- 31 Electronic Throttle Control actuator circuit malfunction. (2) Loose connection (reseat ECM connectors and perform key learns.) (3) Swap ECM with one on a known good truck. Verify ECM: (1) Check power and ground at ECM. If truck has an emergency stop switch, check its function and connections. Check Main “C” relay.Į- 30 ECM circuit malfunction. Should be “no start”, bad sensor.Į- 29 LPG Fuel Cut circuit malfunction. (3) sensor/connections.Į- 28 Camshaft Position sensor. ![]() then - Check: (1) spark plugs, (2) coil packs - one at a time, then as a set. Is it a non-extended crank? But, runs rough, is missing, etc. Is it an extended crank? If yes, verify fuel pressure is correct. Heater circuit signal malfunction.Į- 27 Crankshaft Position sensor. Sensor circuit signal malfunction.Į- 26 02 sensor heater. Perform the two “key learns”.Į- 25 02 sensor. Push and pull individual wires.Į- 24 Accelerator sensor. Check for corrosion at bottom of ETC relay box. Verify 5 volt power supply at the throttle body from ECM. (This is the two-wire sensor to ECM.)Į- 23 Throttle sensor. Check for broken wire, loose connection.Į- 22 Water Temperature sensor. ![]() Check for corrosion on Maintenance ( OBD-II ) connector.Į- 21 Mass Air Flow sensor. Check for poor or no connection at VCM, ECM and M/P. Check power and ground at VCM, ECM and M/P. ![]()
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