D
DarrenK
Guest
On Monday morning the transmission on my '94 4.0l started slipping - it doesn't change into 2nd until 2500rpm (before it was usually the 1750 mark). Whilst reeving through the gears (under normal load) it was all rev and no go; there was a delay of a second or two until it registered I was accelerating. I also think it was 'kicking down' upon touching the accelerator after slowing down to turn into a junction. At the same time, it also started idling weirdly whilst sitting in traffic; every 10/20 seconds the revs would fall until it was about to stall then jump back up to normal; it did this in 'D' with the brake applied and 'N'.
On Monday evening I checked the transmission fluid as per owners manual. Fluid was low (below 'Add', but not drastic), so I topped it up. Now, the level is bang in the center of the hash marks.
Tuesday, all was fine again and running sweet.
Wednesday, back to square one. Doing all the same things it was doing on Monday morning. I checked the fluid level and it's still good.
Engine codes appearing are;
12 - Direct battery input to PCM was disconnected within the last 50 Key-on cycles.
21 - Upstream oxygen sensor response slower than minimum required switching frequency. Upstream oxygen sensor heating element circuit malfunction. Downstream oxygen sensor heating element circuit malfunction. Downstream oxygen sensor input voltage maintained above the normal operating range. Oxygen sensor voltage too low, tested after cold start. (Upstream or Downstream) Left oxygen sensor input voltage maintained above the normal operating temperature.
Note - Engine light has been on for a long time now, I checked it now and again and it was always 51 (A lean air/fuel mixture has been indicated by an abnormally rich correction factor. (O2 sensor)). That's now gone and it's showing the above codes (and no, I haven't got my numbers wrong!)
Now do the error codes have anything to do with the transmission slipping and could they be in any way related with the slippage AND the bad idle? I'm just curious if/how these things could be linked or is it purely an issue with the transmission.
Thanks for the advice.
On Monday evening I checked the transmission fluid as per owners manual. Fluid was low (below 'Add', but not drastic), so I topped it up. Now, the level is bang in the center of the hash marks.
Tuesday, all was fine again and running sweet.
Wednesday, back to square one. Doing all the same things it was doing on Monday morning. I checked the fluid level and it's still good.
Engine codes appearing are;
12 - Direct battery input to PCM was disconnected within the last 50 Key-on cycles.
21 - Upstream oxygen sensor response slower than minimum required switching frequency. Upstream oxygen sensor heating element circuit malfunction. Downstream oxygen sensor heating element circuit malfunction. Downstream oxygen sensor input voltage maintained above the normal operating range. Oxygen sensor voltage too low, tested after cold start. (Upstream or Downstream) Left oxygen sensor input voltage maintained above the normal operating temperature.
Note - Engine light has been on for a long time now, I checked it now and again and it was always 51 (A lean air/fuel mixture has been indicated by an abnormally rich correction factor. (O2 sensor)). That's now gone and it's showing the above codes (and no, I haven't got my numbers wrong!)
Now do the error codes have anything to do with the transmission slipping and could they be in any way related with the slippage AND the bad idle? I'm just curious if/how these things could be linked or is it purely an issue with the transmission.
Thanks for the advice.