OBD codes / P0706
P0706
SeriousTransmission Range Sensor Circuit Range/Performance
Treat P0706 like P0705: drivable with caution, but unpredictable. A shifter position the computer can't trust means possible no-starts, wrong-gear engagement, and missing reverse lights. Because it's often intermittent, don't assume it's fixed just because the symptom went away for a day.
What this code means
This is the sibling of P0705, and the difference matters for diagnosis: P0705 means the range sensor circuit has an outright electrical fault, while P0706 means the signal is present but doesn't make sense — for example the sensor reports two shifter positions at once, or the reported position disagrees with what the transmission is actually doing. In practice that usually points to a misadjusted sensor, worn internal contacts, or sloppy shift linkage rather than broken wiring. The symptoms overlap with P0705: starting problems, wrong or flickering gear displays, no reverse lights, and harsh or delayed engagement. Because an implausible signal often comes and goes, P0706 is a classic intermittent code — it may set only when the shifter sits right on the edge between two positions.
Symptoms you might notice
- Intermittent no-crank, or starts only after jiggling the shifter
- Gear display flickers or shows the wrong position
- Harsh or delayed engagement into Drive or Reverse
- Transmission behavior changes depending on exact shifter position
- Check-engine light, sometimes intermittent
What it costs to fix
Typical range: $80–$500 · about ~0.5–1.5 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Transmission range sensor | $50–$300 | ~0.5–1.5 hrs |
| Sensor adjustment / linkage bushings | $0–$60 | ~0.3–1 hrs |
P0706 is one of the codes most often fixed with adjustment alone — realigning the sensor or tightening up worn linkage costs little. A replacement sensor is the next step, with labor climbing on transmissions where the sensor is internal.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0706 for my exact vehicle →
How to fix P0706
Moderate — doable at home with common tools and patience
- Check the shift linkage and cable adjustment
With the wheels chocked, have a helper move the shifter through the gears while you watch the lever on the transmission — it should hit each detent crisply. A stretched cable or worn linkage bushing lets the sensor sit between positions, which is exactly the implausible reading P0706 describes. Adjustment alone is a common complete fix.
- Inspect the range sensor’s connector and harness
The transmission range sensor (also called the neutral safety switch or PRNDL switch) lives on or in the transmission, low in the splash zone. Look for transmission fluid wicking up into the connector, corrosion, and chafed wires — fluid in the connector is a classic slow killer of the sensor’s contacts.
- Watch the gear-position signal on a scan tool
Slowly move the shifter through every position and watch the reported range on live data. Dropouts, flickering between two gears, or positions that only read correctly with pressure on the lever confirm a worn sensor track or misadjustment — and tell you exactly where it misbehaves.
- Adjust or replace the range sensor
External sensors are bolt-on: mark the old alignment, swap the part, and set the new one with the transmission confirmed in neutral (many use an alignment tool or a small pin). Internal sensors mounted on the valve body require dropping the pan — a bigger, messier job with a fluid refill.
- Clear the code and verify every position
After adjustment or replacement, confirm the dash shows the correct gear in every detent, the engine starts only in Park and Neutral, and the reverse lights work. Those three checks exercise the whole circuit — if all pass and the code stays away, the repair is done.
DIY or shop? The linkage check, connector inspection, and an EXTERNAL sensor replacement are reasonable driveway jobs with basic tools. Hand it to a shop if the sensor is internal (on the valve body), if the fault is intermittent and needs scope-level diagnosis, or if a starter-interlock fault is leaving you stranded.
Tools for the DIY steps: Basic socket set · OBD-II scan tool with live data · Multimeter · Wheel chocks · Alignment pin or tool (sensor-specific)
Not sure which step applies to your car? Get the likely cause for your exact vehicle before buying anything for P0706.
Frequently asked
What's the difference between P0705 and P0706?
P0705 is an outright circuit fault — the signal is bad or missing. P0706 means the signal exists but is implausible, like reporting two gears at once. P0706 leans toward adjustment, worn contacts, or linkage slop; P0705 leans toward wiring and outright sensor failure.
Can a simple adjustment fix P0706?
Quite often, yes. If the sensor has drifted out of alignment with the shifter — or the linkage has worn enough that positions no longer line up — a careful re-adjustment is the whole fix. It's one of the cheaper outcomes in transmission diagnostics.
Why does my car only start when I jiggle the shifter?
That's the classic P0706 tell. The sensor is sitting on the edge between positions, and moving the shifter nudges it back into a valid reading. It confirms the range sensor circuit is the problem — get it adjusted or replaced before it stops cooperating entirely.
Can I drive with P0706?
Short distances, carefully. The transmission itself isn't being damaged, but you can't fully trust the gear display, the starter interlock, or the reverse lights until it's fixed. Intermittent faults have a habit of becoming permanent at inconvenient moments.
Where is the transmission range sensor located?
On most vehicles it’s bolted to the outside of the transmission case where the shift linkage enters — visible from under the car. On some (many Honda and ZF automatics, for example) it’s inside the transmission on the valve body, which turns a 30-minute swap into a pan-drop job. Your year/make/model determines which world you’re in, and it changes the labor estimate substantially.
Seeing P0706 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0706 for my vehicleSymptoms that trigger P0706
Drivers who get this code often notice one of these — each has its own likely-causes and cost guide:
Related trouble codes
Don’t have a scanner yet? A ~$25 Bluetooth adapter reads codes like P0706 from your phone — see our honest guide to the best OBD2 Bluetooth adapters.
Generic OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.