B0788 Engine Trouble Code
What is B0788?
B0788 code can indicate a faulty oxygen sensor, which may eventually damage the catalytic converter (repair cost: $2,000–$2,200). Professional diagnosis costs around $200–$210. Oxygen sensors are often straightforward to replace — check your owner's manual for location and instructions. This issue should be addressed promptly to prevent further damage.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Code: | B0788 |
B0788 Symptoms
Check Engine Light
Illuminated dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration
Starting Problems
Difficulty starting the engine
B0788 Code Structure
Understanding what each digit means in the B0788 body trouble code:
| B | 0 | 7 | 8 | 8 |
|---|---|---|---|---|
| Body Code | Intake Valve Control Solenoid Circuit Low | Fuel Rail Pressure Sensor Circuit Malfunction | Ignition/Distributor Engine Speed Input Circuit Malfunction | Clutch Position Sensor Circuit Malfunction |
How to Fix B0788
Diagnostic Steps:
Regarding B0788, carefully inspect the wire harness near the intake manifold bracket, best accessed from below near the oil filter. Look for chafing, pinching, or damaged insulation.
Repair Solution:
Verify all electrical connections are clean and tight. Check for damaged wiring, especially in high-heat or high-vibration areas. Use manufacturer wiring diagrams for accurate diagnosis.
Technical Notes:
B0788 on electronically controlled automatic transmissions relates to shift solenoid operation. The solenoid actuates hydraulic circuits controlling clutches or bands for gear changes.
B0788 Description
B0788 engine trouble code is related to Clutch Position Sensor Circuit Malfunction.
Main Cause
The primary reason for B0788 OBD-II Engine Trouble Code is: Fuel Rail Pressure Sensor Circuit Malfunction.