P2702 code definition
The P2702 code indicates the car’s computer has found a malfunction with the transmission friction element.
What the P2702 code means
The P2702 code means that a malfunction has occurred with the transmission friction element’s application. Your car’s computer compares the RPM output signal to the RPM input signal. If they are not within an acceptable range, this indicates a friction element application malfunction. Essentially, this is the same thing as a transmission slipping.
What causes the P2702 code?
A number of potential problems can cause the P2702 code to set in your car’s computer, including the following:
- Low transmission fluid causing the transmission to slip
- A transmission fluid leak causing low fluid levels
- A faulty transmission fluid pump causing low fluid levels
- Input or output sensors defective
- Open or short in wiring for electrical components
What are the symptoms of the P2702 code?
You may experience one or more of the following symptoms when the P2702 code is set:
- Harsh shifting
- Transmission slipping
- Transmission will not engage
- Vehicle stuck in “limp-home” mode
- Check Engine light on
How does a mechanic diagnose the P2702 code?
The first step to diagnosing the problem will be connecting an OBD II scanner to the car’s communication port. The mechanic will read the codes, and verify that the P2702 code is present. Note that a test drive should NOT be performed in this instance.
Next, the mechanic should inspect the wiring and connectors, particularly any that have been contaminated with engine oil, transmission fluid or power steering fluid. These fluids are caustic and can cause damage to wiring, connections and components. Any opens or shorts should be repaired immediately, prior to any further diagnostic work.
The mechanic should then check the level and condition of the car’s transmission fluid. If leaks are present, they must be repaired, and the transmission filled to the correct level with fluid. If finings are found in the transmission fluid, it may indicate severe damage to internal components. However, not all instances of the P2702 code will require a transmission rebuild. With that being said, if there is a leak from the front seal that requires the transmission be removed for repairs, and the transmission has high mileage, a rebuild would be a wise option.
Common mistakes when diagnosing the P2702 code
The most common mistake made here is assuming that bringing transmission fluid levels back to normal will solve the problem. In some instances, the fluid level was low for long enough that severe transmission damage has occurred. However, some mechanics make the mistake of assuming that the transmission needs to be rebuilt when it in fact does not.
How serious is the P2702 code?
The P2702 code is very serious. Driving with this code stored can cause irreparable damage to internal transmission components. If you notice any transmission slippage or harsh shifting, immediately have the problem diagnosed by an experienced mechanic.
What repairs can fix the P2702 code?
The repairs needed to fix the P2702 code will vary depending on the actual cause of the problem. They can include any of the following:
- Refilling the transmission fluid
- Repairing leaks and refilling the transmission fluid
- Repairing wiring harness opens and shorts
- Repairing loose connections
- Replacing a failed transmission pump
Additional comments for consideration regarding the P2702 code
Too often, mechanics go to one extreme or another when diagnosing the P2702 code. Some assume that just refilling low transmission fluid will solve the problem, while others assume that a single overheating incident with the transmission warrants rebuilding. The truth is usually somewhere in the middle, and a full diagnostic will reveal exactly what needs to be done.
Need help with a P2702 code?
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