What Does P1704 Mean?
The digital transmission range sensor failed to transition through all expected gear position states during Key On Engine Off (KOEO) or Key On Engine Running (KOER) self-tests. This indicates the sensor is not properly reading all shift positions.
Common Causes
35%
Misadjusted or improperly installed transmission range sensor
25%
Worn or damaged shift linkage preventing full range of motion
20%
Failed digital transmission range sensor
15%
Damaged sensor mounting or internal detent mechanism
5%
Faulty TCM not recognizing valid sensor transitions
Diagnostic Steps
1
Step 1: Perform manual shift through all gear positions (P-R-N-D-L) and verify smooth operation
2
Step 2: Monitor digital transmission range sensor values in live data during gear selection
3
Step 3: Check transmission range sensor adjustment per manufacturer specifications
4
Step 4: Inspect shift linkage/cable for wear, binding, or incomplete travel through all positions
5
Step 5: If linkage is good, remove and inspect range sensor for proper mounting and mechanical operation
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The digital transmission range sensor failed to transition through all expected gear position states during Key On Engine Off (KOEO) or Key On Engine Running (KOER) self-tests. This indicates the sensor is not properly reading all shift positions.
The most common cause of P1704 (Digital TRS Failed to Transition States in KOEO / KOER) is: Misadjusted or improperly installed transmission range sensor
Typical repair costs for P1704 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May prevent starting, cause incorrect gear display, or prevent proper transmission operation. Backup lights may not function correctly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1704 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Gear Selection
Difficulty
Type
Manufacturer
Recommended Tools
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