What Does U1253 Mean?
Similar to U1252, this code indicates missing or invalid Class A function data on the SCP network. This typically represents a different module detecting the same network communication problem or a related but distinct Class A message failure.
Common Causes
30%
Primary communication module (BCM or Gateway) failure
25%
SCP bus wiring fault including opens, shorts, or high resistance
20%
Powertrain Control Module not broadcasting required messages
15%
Power supply issues affecting network modules
10%
Failed network module creating bus interference
Diagnostic Steps
1
Step 1: Compare U1253 setting module with U1252 to determine if different modules see same fault
2
Step 2: Check all network module power and ground circuits with DVOM
3
Step 3: Use scan tool PID monitoring to determine which specific data messages are absent
4
Step 4: Perform network integrity test using oscilloscope to verify signal quality
5
Step 5: Replace or reprogram suspected module after isolating communication failure
Estimated Repair Cost
$150 - $950
Parts + labor, varies by vehicle and location
Similar to U1252, this code indicates missing or invalid Class A function data on the SCP network. This typically represents a different module detecting the same network communication problem or a related but distinct Class A message failure.
The most common cause of U1253 (SCP (J1850) Invalid or Missing Data for Class A Functions) is: Primary communication module (BCM or Gateway) failure
Typical repair costs for U1253 range from $150 to $950, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle operation may be impaired with reduced functionality. Critical systems like ABS or traction control may be affected depending on which messages are missing.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1253 to identify the root cause.
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Quick Info
Category
Network
System
Network Communication
Difficulty
Type
Manufacturer
Recommended Tools
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