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code 37

I have a 90 plymouth acclaim--2.5L--3 speed automatic--non turbo. It showed a code 37. I guess that is the PTU solenoid. Some info showed the PTU solenoid to be on the passenger side fender-well, there are a couple of solenoids on that side, they have an electrical connector and vacuum lines. I was told the pTU solenoid has no vacuum lines, so now I'm confused. Where is the PTU solenoid? I don't think my converter is locking-up. thanks

Reply to
jd
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If it had one, the PTU solenoid would be in the transmission.

Not all FWD 3 speed transaxles had a PTU solenoid, but the SMECs used had the programming regardless of whether the vehicle was so equiped or not, so it is very possible that your code 37 is a false code. Also, there was a TSB issued back around 1990 for disabling the PTU circuitry to improve driveability (amounted to un-plugging the connector from the transaxle).

If there is an electrical connector behind the dipstick hole on the transaxle, it is equiped with a PTU solenoid.

Reply to
Neil Nelson

Thanks for the info Neil & Daniel. It does have a connector by the transaxle dip-stik. I've only driven the vehicle once and I couldn't feel the converter lock or unlock, plus the code. My guess is it never locks and I wondered what that would do to the transaxle and gas mileage. You folks have answered both questions, so I'm not going to worry. There are no driveability issues. thanks

Reply to
jd

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