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I am having a problem with my 2004 Honda Accord Sport 2.2 Diesel- here is my issue-- in cold conditions the heater plug light flashes continuously and the engine looses power allowing only revs up to and under 2000- it loses pick-up and performance. I brought it too my mechanic who did a reading on it in mild weather and could find no fault- yesterday the heater plugs flashed and performance slowed again and going up a hill the car began to chung slightly then the engine management light came on and the car died. After about 5-10 mins I was able to start the car and drive very slowly to the garage.
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This is your transmission control unit telling you there is a problem. I have another post here (http://www.fixya.com/cars/t5554380-92_honda_accord_d4_light_flashing) with details on how to diagnose. This link says "flashing D4 light" but the issues it the same. 90-91 accords have flashing S lights for TCU errors, and 92-93 have flashing D4 lights.
hi, there maybe problem with the ignition, the heater trigger on the ignition may be a little loose thats why you have to shake it and comes to contact on a certain time. check the heater relays too for it maybe faulty already. hope this helps
#1. Check coolant level,(engine stone cold and not running) change to a new one if not done in last 2 years. #2. Change thermostat to a new one, Honda thermostat only, also every 2 years. #3. In the thermostat housing there is a "coolant switch A" you should have a plug going to it, unplug it and while your engine is running almost at operating temp, bridge 2 wires with a wire, your cooling fan/fans should come on, also check for continuity you should have no continuity when engine is cold and continuity when the engine is at operating temp.
#4. If there is no continuity when engine is at operating temp then you need a new "coolant switch A"
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