What the P0402 code means. Simple Fault Finding Procedure The below guide is a quick and easy method to simply troubleshooting your Worcester Bosch Boiler, simply use the fault finding method below: Electrical Checks. P0402 is an OBD-II generic code that the engine control module (ECM) has detected indicating the engine exhaust gas recirculation (EGR) valve is flowing too much recirculated exhaust gases when it is commanded to open the flow of gases into the intake manifold. 82. Switch OFF the appliance. A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. False flame fault – flame detected after burner stop. Fan motor current detection failure. Make sure that the pilot control valve of … ... That will not always be detected by the ECU. Ensure system has appropriate electrical polarity. The EVAP system communicates with the PCM and when there is a vacuum leak in the system, there are one of three codes that can be … Loose or corroded wiring can cause your valve to remain closed. Solenoid Valve Fail Guide. Water over-fill fault: Check for high water pressure to unit, usually an indication of a bad water inlet valve: C5: Low water fill: Check for low water pressure to unit, usually an indication of a bad water inlet valve: C6: Water temperature too low after 20 minute extension: Check heating element and thermostat, both should have continuity: C7 When this code is stored, that means the PCM (powertrain control module, also known as ECM or engine control module in other vehicle makes) has detected a malfunction in the exhaust gas recirculation (EGR) system “B” flow for the specific step-down setting. Check the gas valve. Test the electrical circuits by checking for short circuits, continuity (earth) and resistance (to earth). The furnace will lock out for one hour and then restart. Secondly, the issue could be just as easily an electronic fault, as it could be a gas valve fault. Remove the valve plug and connect it to a multimeter. Fan sensor not detected. Code P0457 Definition. 73. What Does the P0405 Code Mean? Gas Control electronic fault detected. 8 RED FLASHES: This fault is indicated if the flame is lost 5 times (4 recycles) during the heating cycle. Most of these switches are electronically controlled. How the EVAP system works. Water By-Pass Control Fault. Gas valve is functioning normally Gas valve is not powered. If the smell persists, call your gas utility at once. 3 – Unplug the touch pad ribbon connector from the electronic range control. 79. 72. High volts could mean there is a blockage somewhere within the EGR valve and no voltage could signal a problem with the valve and computer communication. If someone has previously tried to fix a gas valve fault, it’s likely they may have tried to change the adjustment on the valve. Many Netaheats have been scrapped with suspected gas valve failure when the fault actually lies in a soldered joint on the control board which fails from heat stress. FB 365: Gas valve EV1 leak test failed. Replace Check the fan for the blockage and the electrical supply: d7: Modulator coil failure (regulator valve on gas valve) Check the cable connection. Check the fan: C8: Fan speed can not reached to target speed. The car then needs to be plugged into a diagnostic machine to obtain the correct fault code to ascertain that it is indeed the EGR valve causing the problem. 5 – Replace any of the covers that were removed to access the electronic … Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Μodule (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Μodulator. A bad gas valve in a Honeywell appliance such as a water heater or furnace that is powered by natural gas can go bad and affect the performance of the unit. 49 Eight-One Flash, three second pause FVS fault detected 89 Eight-Two Flash, three second pause Temperature sensor fault detected 15 Eight-Three Flash, three second pause Electronics fault detected 93 Eight-Four Flash, three second pause Valve fault detected No Power or No Blower Motor Indications Display Nothing happens at all. FD 231: Mains power fault – electrical power interruption. The designation "B" refers to a certain position of the step-down EGR valve. Detected false flame. FA 364: Gas valve EV2 leak test failed – gas valve leak. 76. Turn up thermostat on gas valve; observe blinking blue light; otherwise replace control. Verify power to the gas control thru the black wire (pin #1) on the gas valve Molex. What Does P0457 Mean? All piping must comply with local codes and ordinances. The gas valve on your boiler will open and close, attempting to provide the burner with the correct level of gas. My Honeywell Water Heater Gas Valve Control is giving the 5 Flash Code "Sensor Failure". It is triggered when the PCM fails to detect some change in manifold air pressure when the EGR valve is activated. The Exhaust Gas Recirculation Valve, or more commonly known as the EGR valve, controls the engines emission of nitrous oxidize or Nox. ... valve electronic fault 3. Although system designs vary, the heart of nearly all EGR systems is the EGR valve. Because gas is involved, problems with gas valves are a major safety concern. It is flashing 8 pause 4 on the led. 1. em will reset wnen 2. lot name is sufficient Insufficient water heating will reset 2. 2 – Access the back of the electronic range control “clock” or ERC. Vent type control data failure. 4. Fitting a new gas valve without checking the electronics, could result in an expensive repair bill, and the F62 fault code still being present. This type of equipment is used to detect a gas leak or other emissions and can interface with a control system so a process can be automatically shut down. Code P0405 indicates a problem with the exhaust gas recirculation system. Communication problem between remote controller and water heater. This helps lower your engine’s combustion temperature for a reduction in oxides of nitrogen (NOx) emissions. 5. The procedure to test an electronic EGR is a bit different and requires a multimeter. Measure the gas valve coils I and II electrical resistance. 71. Is the reset function on my boiler designed to fix problems like the F62 fault code yes: Reconnect the connectors. White Rodgers/Robertshaw Gas Valve Testing and Replacement 15 RG-V Honeywell Gas Control Testing, Disassembly, and Replacement 20 RG-VI Burner Operation Inspection, Adjustment, Cleaning and Replacement 31 RG-VII ... Thermostat/well sensor fault. I have a Honeywell gas control valve on my hot water heater p/n 222-45613-01A. Evaporative Emission (EVAP) Control System Leak Detected. Remove gas valve and check inlet filter for blockage. Un-plug the connectors from the gas valve. A1 281: Pump stuck or running with air in the system. If you notice your vehicle running poorly, stalling or having poor gas mileage, you should test the EGR. This could be caused by low gas pressure or faulty gas valve. Ignition Retry - If flame is not established on the fifth trial for ignition (initial try + 4 re-tries), the control de-energizes the gas valve and goes into lockout. Replace and repair the parts of the water heater with caution. Light pilot ... out betore attempting to relight pilot name detected. No flame detected: 5 02: Flame detected with gas valve closed: 5 04: Flame lift: 5 P1: 1st Ignition Failed: 5 P2: 2nd Ignition Failed: 5 P3: Flame cut-off: air inlet/ flue gas outlet faults: 6 04: Insufficient fan speed: 6 10: Thermofuse open: multi-zone heating faults: 7 01: Zone 2 … Loose Pilot Valve Wiring: The pilot valve is a small device that opens and closes to release the small burst of gas that lights your pilot and burner. The valve operates similarly to the ones fitted in older models, only that an electronic EGR position sensor communicates with the vehicle’s computer for easier and faster control. Read the code as p0401 P0401 - Generic Type Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled Description Exhaust Gas Recirculation "A" Flow Insufficient Detected Wondering if any others have had similar before I contact Vw? 74 . P0402 code definition. Gas cut off defective . If it does not receive any voltage, you must check the wiring to the PCM. Low gas pressure, faulty gas valve, faulty hot surface ignitor or burner problem may cause this. Exhaust Gas Recirculation Flow Excessive Detected . Are there any checks/repairs that can be done or is a new valve required? If it works well, you should have a 12-volt indicator when you switch it on. Wiring of valve and receiver must be completed before starting ignition. G.I.S valve control failure. 5 flashes Twin communications fault If you smell gas at any time except momentarily when removing the gas line, make sure the gas supply is properly turned off. ... with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or The International Fuel Gas Code or B149.1 in Canada. If your solenoid valve stops working, fails, over heats, buzzes, fails to close or fails to open, never worked, worked for a while or just died after years of use then this guide may prove helpful.. Solenoid valves are designed to control, divert or simply open and close against liquid, gas or even vacuum media. An EGR system is important because it reduces emissions by allowing burnt exhaust gas to flow back into the engine. Turn thermostat all the way up. coil II : R = 400 50 ? However, that’s not possible if it’s been incorrectly adjusted. The Netaheat Electronic was the next major development in the design of this pathleading boiler. The purge valve solenoid can be checked using a vacuum pump. C1 264: Airflow stopped during operation. 4 – Clear all so the Oven will not electrically short when power is regained. False pilot control is not or physically damaged Turn set point knob to "OFF" Clogged Pilot Line: Burning gas can sometimes release moisture. Fault Location Probable Cause; P0402 : Exhaust gas recirculation (EGR) system -excessive flow detected : Hose leak/blockage, basic setting not carried out (if applicable), wiring, EGR valve… 80. The Evaporative Emission (EVAP) Control System is in vehicles to prevent the emissions of fuel vapor (hydrocarbons) into the atmosphere. Verify power to the blower at the yellow wire (pin #3) on the gas valve Molex. The control flashes a "4" on the LED to indicate ignition failure lockout. Had an engine light on today. It helps your vehicles to efficiently burn unused fuel by recirculating a portion of your exhaust through the process again. 81. 75. A gas detector can sound an alarm to operators in the area where the leak is occurring, giving them the opportunity to leave. No false flame detected. According to the chart this indicates "gas valve fault detected". A stored code P049B means that the powertrain control module (PCM) has detected a malfunction in the exhaust gas recirculation (EGR) system "B" flow for a particular step-down setting. 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