P0740 is one of the most typical transmission problem codes. It way that the Neon‘s computer system has detected the there is an issue with the torque converter clutch (TCC) solenoid circuit.

P0740: talk Converter Clutch Circuit Malfunction

The TCC “locks” the drivetrain, which permits for a true mechanically connection between the transmission and also the engine. In effect, this allows an automatic infection to function like a hand-operated transmission at certain speeds and engine loads, and also eliminates every slipping from the transmission.

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P0740 Symptoms: dodge Neon

The symptoms of P0740 differ greatly. If the converter continues to be unlocked, it have the right to be a nuisance. If that locks once it shouldn’t be, that’s wherein it can gain dicey.

The most usual symptoms include:

bad Gas Mileage- If the converter is not locking in ~ speed, the engine’s RPM’s will remain higher. This to reduce fuel mileage. Stutters and Stalls- This would certainly be a symptom of the transmission locking when it should not be. It feels exactly like when you should downshift in a hand-operated transmission. Greater RPM ~ above highway- If the converter is no locking, it have the right to lead to greater RPM on the highway. This rises fuel mileage and makes the transmission operate at a greater temperature. Organization Engine shortly Light

Here’s a good video ~ above diagnosing this code:

P0740 reasons Dodge Neon

There are countless different points that can reason the P0740 code. Many of them room going to need an specialists touch come diagnose.

This list is presented through a mix of likely to reason the issue and also repairability in psychic first.


Transmission Fluid

If there isn’t enough infection fluid, the transmission will not have the ability to operate normally. Over there are countless symptoms of low transmission fluid. The many noticeable one is walk to be the infection slipping.

If the transmission liquid is dirty or burnt, it deserve to make the transmission behave in a method that is not normal and also throw the P0740 code. Here’s a pretty good guide on transmission liquid color.

If the liquid is low or bad, replacing need to be considered an urgent priority. The an excellent news is that transmission fluid and also filters space cheap.

Wiring Issues

The wiring harness that goes to and from the transmission is among the an ext vulnerable piece of wiring ~ above a vehicle. Inspecting the exploit for apparent signs that distress, checking the link at the infection itself, and finally a continuity test can go a long method in diagnosing her Neon.

TCC Solenoid

It is very likely the the talk converter clutch solenoid (TCC) has actually gone bad. But, jumping right to this conclusion without inspecting the transmission fluid and wiring can cause a lot of undue headache.

Torque Converter

The talk converter chin or talk converter clutch can go bad and also throw the P0740 code.

Problem in the Case

If the TCC seems to be functioning properly, it might be that the trouble is in the transmission situation itself. It can be a valve human body issue, a difficulty with the press going with the transmission, or a clogged filter.

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Articles top top this site are always written through the DIY enthusiast in mind. Many of the time, you’re no looking this codes up for casual reading. You’re looking them increase to resolve your vehicle. Us would never ever want to discourage that. With that gift said, P0740 is a tougher code to diagnose and is frequently out that the selection of the the shade tree mechanic.

If over there is anything the you would like to add, you re welcome feel cost-free to leaving a comment.