Ck engin lgt on, D4symbol blinking, speedometer erratic
On drive home, 60mph hiway, check engine lgt came on, D4 symbol was blinking, speedometer gauge moving from 0 to real speed. No rise in heat guage, no nasty noises from engine. scared me, never had this problem so I'm worried. best guess? can I drive it to a mechanic tomorrow AM? expensive repair? Best guess? Like all of us, I'm on a tight budget, it would help to have a clue. Safe to drive to a shop if I can find one with time to look? Thanks. Helen
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This is an internal transmission failure the check engine light along with the D4 light flashing and the slipping is telling you this. What happens is the clutches internal in the transmission fail and no longer hold pressure and cause the transmission to fail triggering the check engine and D4 light.
These Accords have common problems with both the instrument clusters & the speedo drive Transducers. It is the Speedo Transducer I would head for first though,it is located on the top rear of the transmission, over the diff assembly. This is in between where the driveshafts enter the transmission. It is held in by 1 x 10mm bolt & has an electical connector clipped in to it which from memory has 3 wires. The connector is somewhat triangular in shape & should be black. Check that this is not full of coolant from your recent thermostat change, however I doubt that this is the problem as they are sealed pretty well. The chances are it is just faulty. This unit creates an electrical pulse which tells both the speedo & the transmission computer how fast the vehicle is going. Without it the transmission computer will register a fault (D4 lamp flashing). It also informs the engine computer that there is a problem which will activate the Check Engine Lamp.
If the drive light flashes there COULD be a trans problem. The Ck Engine light and the D4 light are on for the same reason. Take it to a qualified repair shop to have it checked out. Find a shop that regularly works on HONDA and not some chain store operation.
Hi, a few questions 1st. Did your mechanic check for engine codes? Is your Honda a v-6 or 4 cylinder? The flashing D4 light indicates a possible transmission malfunction. You should avoid rapid acceleration until the cause of the light blinking is determined. If you have the V-6, there is a diagnostic port to connect a scan tool to read any stored engine codes that have turned on the check engine light. This port is located behind the ashtray in the center console (most cars did not have this til 96). If you have the 4 cyl engine, there is a service connector located under the dash on the pass. side. Inside the connector is what looks like a 2 wire plug should be attached. Take a paper clip, unbend it, and insert the 2 ends of the clip into the connector to 'jump' it. Turn the ignition switch to the on position (don't start the vehicle), and the check engine light will flash. Count the flashes, short flashes are for code #'s 1 to 9 (single digit code), a 2 digit code will be a long flash for the 1st digit, followed by a short flash for the 2nd digit. If there is more than one code, they will be separated by a pause. They will repeat so you can count them and write them down. Let me know what the code #'s are so I can help further. Curt
Try to find the speedo-cable from the firewall down the the
transmission. Usually on auto trannys the speedo head (the signal
generator which is a gear basicly) is located on the top of the tranny,
of course attached to the speedo cable. If it's a 'drive by wire' car
and there's no cable - it will require more investigation.