P0702 OBD-II Trouble Code: Transmission Control System Electrical

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0702 code

P0702 is a diagnostic trouble code (DTC) for "Transmission Control System Electrical". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $0.0 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $0.0 $20.0
Toyota $0.0 $20.0
BMW $0.0 $20.0
SCHEDULE P0702 DIAGNOSTIC Get a fair and transparent estimate upfront

P0702 code definition

Storage of a P0702 trouble code signifies that the Powertrain Control Module (PCM) has detected a problem with the automatic transmission control system. Related trouble codes include P0700 and P0701.

What the P0702 code means

A P0702 trouble code means that one of the transmission's sensors, solenoids, or switches has sent a signal to the PCM of the detection of a reading that doesn't match the manufacturer's specifications. In addition, the PCM can store a P0702 trouble code when other transmission-related trouble codes are stored.

What causes the P0702 code?

Some of the more common causes of a P0702 trouble code include the slippage of a transmission component, failure of the torque converter clutch, and shift solenoid failure. A low fluid condition in the transmission can also cause the storage of a P0702 trouble code to the PCM. Faulty sensors, solenoids, or switches can cause a P0702 trouble code, as well as any faulty wiring or connectors.

What are the symptoms of the P0702 code?

Some of the symptoms often associated with a P0702 trouble code include:

How does a mechanic diagnose the P0702 code?

To properly diagnose a P0702 trouble code, a mechanic needs a suitable code reader, a manufacturer's wiring schematic, and a digital volt/ohmmeter. The mechanic should also perform the following when diagnosing the code:

  • Visually inspect the wiring and connectors to the PCM, using the manufacturer's wiring schematic for guidance.
  • Connect the scanner to the diagnostic connection to download any freeze frame data and stored trouble codes.
  • After all wiring, connectors, and components have been replaced or repaired, the mechanic should clear the code and take the vehicle for a test drive to see if the code returns.

Common mistakes when diagnosing the P0702 code

A common misdiagnosis is for the mechanic to rebuild the transmission and replace the torque converter in the belief that this can fix the problem. Oftentimes, a fix is as simple as replacing a faulty component or wiring.

How serious is the P0702 code?

A P0702 trouble code, if left unfixed, can lead to catastrophic failure of the transmission, especially in a low fluid condition. A mechanic should attempt to fix and clear other trouble codes related to the transmission before trying to fix this code, since this code is sometimes associated with other transmission-related codes.

What repairs can fix the P0702 code?

With a P0702 trouble code serving as an informational code for other more specific problems, dealing with the other codes first can often fix and clear the code. If the code returns after fixing all other transmission problems, the mechanic should attempt the following repairs:

  • Repair any damaged wiring, connectors, or components.
  • Rebuild the transmission, perform a fluid flush, and replace the torque converter if the transmission has suffered extreme damage for a low fluid condition that was allowed to go on for too long.
  • In addition, in a low fluid condition, fill the transmission to an appropriate level to fix any leaks. Afterward, the mechanic should fill the transmission with fluid to the appropriate level.
  • Replace any faulty sensors, solenoids, or switches.
  • Replaced the hydraulic pump if the problem lies there.
  • Replace the PCM if faulty or this code is stored in a vehicle with a manual transmission.

Additional comments for consideration regarding the P0702 code

The storage of a P0702 trouble code is an indicator of more specific transmission problem and usually precedes the storage of a more specific transmission-related trouble code. This code is specific to vehicles with an automatic transmission, and if found on a vehicle with a manual transmission, it indicates a faulty PCM.

Need help with a P0702 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
trouble codes
P0702

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0702 code.

SCHEDULE P0702 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6652)

Rating Summary
6165
233
54
36
164
6165
233
54
36
164
 at YourMechanic

William

34 years of experience
387 reviews
William
34 years of experience
Honda Passport V6-3.2L - Check Engine Light is on - Glendale, Arizona
He is a good Macknic and a nice man and also very helpful and trustful person. I am so happy his job..Long live William and his family.
 at YourMechanic

Matthew

33 years of experience
1080 reviews
Matthew
33 years of experience
Honda Accord V6-3.5L - Check Engine Light is on - Newport News, Virginia
Matthew always takes time to explain how (the parts that need repair) they function in the car. He works quickly and is always friendly and prompt. He does great work!
 at YourMechanic

Paul

25 years of experience
237 reviews
Paul
25 years of experience
Mercedes-Benz E350 V6-3.5L - Check Engine Light is on - Las Vegas, Nevada
Paul was very knowledgeable and professional. he explained what it would cost to get my car repaired and I felt very comfortable with his expertise in repairing my car.
 at YourMechanic

Victor

35 years of experience
191 reviews
Victor
35 years of experience
Pontiac Grand Prix - Check Engine Light is on - Albuquerque, New Mexico
Victor showed up earlier than the appointed time so that was great. He did the diagnostic and he listened to what problems I’ve had with my car. Overall, I had more information and a complete diagnostic done without question. I would recommend him for anyone.


More related articles

P0744 OBD-II Trouble Code: Torque Converter Clutch Circuit Intermittent
P0744 code means there is an abnormality in the torque converter clutch circuit often due to transmission failure or internal blockages.
P0027 OBD-II Trouble Code: Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 1)
P0027 P0027 trouble code definition Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 1) What the P0027 code means P0027 is the OBD-II generic code indicating the engine control module (ECM) has determined that the variable valve lift for the exhaust...
P2016 OBD-II Trouble Code: Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 1
P2016 P2016 code definition Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 1 What the P2016 code means P2016 is an OBD-II generic code for the Engine Control Module (ECM) detecting a low voltage failure in the intake manifold runner...

Related questions

Check Engine Light

If your vehicle's check engine light illuminates, there is a malfunction that should be diagnosed and repaired. If the check engine light is flashing, that means there is a serious fault, such as cylinder misfiring, that requires immediate repair. Misfiring,...

Could this be the TCM causing the problem?

Yes, no start in the scenario you are describing is possible especially if Code U1000 has set, along with other codes such as P0717, but there are multiple code scenarios or combinations. One quick strategy is to pull and visually...

Check Engine Light is on - trouble code P0420

As you may know, trouble code P0420 relates to the inefficiency of the catalyst system, which detects the presence of oxygen in the exhaust gases. This can be caused by failing O2 sensors that need to be replaced. This can...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com