P0908 — Gate Select Position Circuit Intermittent #

Note: The code description may vary depending on the vehicle manufacturer.

• Gate Select Position Circuit Intermittent (General/SAE)
• Gear Selector Position Sensor Circuit Intermittent (Volkswagen/Audi)
• Transmission Gate Selection Switch Intermittent (Ford)
• Selector Lever Position Signal Intermittent (Nissan)

Summary of DTC P0908 #

DTC P0908 refers to an intermittent electrical issue within the gate select position circuit of the transmission system. The gate select position circuit is responsible for detecting and reporting the position of the gear selector (or shift lever) to the transmission control module (TCM). When this code is set, it means the TCM has detected sporadic or unreliable signals from the circuit, which can affect gear selection and shifting performance. The problem is often electrical in nature, such as a poor connection or damaged wiring, but could also originate from a faulty position sensor or module. While not always immediately disabling, this issue may lead to inconsistent shifting, warning lights, or even limp mode if left unresolved.

Frequent Symptoms for DTC P0908 #

Drivers or technicians encountering code P0908 may notice subtle or dramatic changes in the vehicle’s shifting behavior. Symptoms can range from barely noticeable hesitations to complete loss of certain gear functions. The intermittent nature means that issues may come and go, sometimes making diagnosis tricky. Common symptoms include:

• Illuminated Check Engine Light or Transmission Warning Light
• Unpredictable or harsh gear shifting
• Vehicle stuck in a single gear (“limp mode”)
• Delayed response when changing gear positions
• Failure to start or move out of “Park” or “Neutral”
• Intermittent loss of communication with TCM

Probable Causes of DTC P0908 #

While several faults can trigger P0908, some are more common than others. Typically, wiring and connector issues top the list, but sensor and module faults are not rare. Here’s an ordered list from most to least likely:

1. Loose, corroded, or damaged electrical connectors at the gear selector or TCM
2. Chafed, pinched, or broken wiring in the gate select position circuit harness
3. Faulty gate select position sensor (sometimes called the selector lever position sensor)
4. Contaminated or damaged selector assembly (from spilled liquids or physical impact)
5. Faulty Transmission Control Module (TCM) (rare, but possible)
6. Internal transmission wiring harness issues

Step-by-Step Diagnosis for P0908 #

Proper diagnosis is essential to avoid unnecessary parts replacement. Begin by confirming the code with a reliable scan tool, then proceed systematically:

1. Verify the code with a scan tool and check for related codes (especially those related to transmission or communication errors).
2. Visually inspect the gear selector assembly and electrical connectors for signs of corrosion, loose pins, or damage.
3. Check wiring continuity between the selector sensor and the TCM using a multimeter, looking for opens or shorts.
4. Wiggle test the harness while monitoring live data to catch intermittent faults that only occur with movement.
5. Test the gate select position sensor according to OEM (Original Equipment Manufacturer) specifications (resistance, voltage output).
6. Inspect for moisture or contamination at the selector assembly, especially if located near cup holders or floor mats.
7. If all else checks out, evaluate the TCM and internal transmission harness as per OEM guidance.

Possible Repairs for DTC P0908 #

Repairs should directly address the diagnosed root cause. Always clear the code and retest after repairs. Common fixes include:

• Cleaning and securing electrical connectors at the selector and TCM
• Repairing or replacing damaged wiring in the circuit harness
• Replacing the gate select position sensor if faulty readings or intermittent output are confirmed
• Cleaning or replacing the gear selector assembly if contaminated or physically damaged
• Replacing the Transmission Control Module (TCM) in rare cases where it fails to communicate correctly
• Repairing or replacing internal transmission harnesses if found defective

Is It Safe to Drive with P0908? #

Driving with a P0908 code is generally not recommended. While the vehicle may continue to operate, intermittent loss of gear selection can cause unpredictable shifting, hesitation, or even complete loss of drive, especially at inconvenient times. In some cases, the vehicle may enter limp mode or refuse to move out of Park or Neutral, leaving you stranded. For your safety and to avoid further transmission damage, address this code as soon as possible.

Vehicles Most Commonly Affected by P0908 #

While P0908 is a generic OBD-II code, it is more frequently reported in vehicles with electronic or automated gear selectors, especially those from European and Asian manufacturers. The following makes and models are often associated with this code:

• Volkswagen (VW): Passat, Golf, Jetta, Tiguan
• Audi: A3, A4, Q5
• Nissan: Altima, Rogue, Sentra
• Ford: Focus, Fiesta, Transit (with automated manual transmission)
• BMW: 3 Series, 5 Series (with electronic shifters)
• Honda: Accord, CR-V (with push-button or electronic selectors)

Common Mistakes and Best Practices for P0908 #

Misdiagnosis often leads to unnecessary part replacements and increased repair costs. To avoid common pitfalls:

• Do not replace the gate select position sensor without first inspecting connectors and wiring; most codes are caused by poor connections.
• Avoid guessing: always perform a thorough visual and continuity check before condemning expensive components.
• Use OEM diagnostic procedures and wiring diagrams to ensure accuracy.
• Test after each repair step rather than replacing multiple components at once.
• Check for TSBs (Technical Service Bulletins) related to gear selector wiring or sensor issues for your specific vehicle.

Express FAQ for DTC P0908 #

Q1: Can I reset the P0908 code and keep driving?
A: While clearing the code may temporarily turn off the warning light, the underlying issue will likely return. Address the root cause to prevent drivability problems and potential transmission damage.

Q2: Is P0908 always caused by a faulty sensor?
A: Not necessarily. Most P0908 cases are due to wiring or connector issues rather than sensor failure. Test the circuit thoroughly before replacing any parts.

For any further questions or if you’re unsure, consult a qualified technician or refer to your vehicle’s OEM service information.