B2988 Engine Trouble Code
What is B2988?
B2988 indicates potential catalytic converter failure. If completely failed, your vehicle may not run properly and fuel economy will suffer significantly. Average replacement cost is $2,000–$2,140. This repair requires professional service and should not be delayed.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Code: | B2988 |
B2988 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
B2988 Code Structure
Understanding what each digit means in the B2988 body trouble code:
| B | 2 | 9 | 8 | 8 |
|---|---|---|---|---|
| Body Code | Fuel And Air Metering (Injector Circuit Malfunctions Only) | Injector Circuit Malfunction - Cylinders | Ignition/Distributor Engine Speed Input Circuit Malfunction | Clutch Position Sensor Circuit Malfunction |
How to Fix B2988
Diagnostic Steps:
The catalytic converter has oxygen sensors before and after it. When warm and in closed-loop mode, the upstream O2 sensor reading should fluctuate, while downstream should remain steady.
Repair Solution:
Gasoline engines use spark plugs to ignite fuel-air mixture. Proper timing ensures the explosion occurs when the piston is positioned correctly. Incorrect plug wire sequencing causes mistimed ignition, resulting in poor performance.
Technical Notes:
B2988 DTC specifically relates to camshaft timing. When cam timing is over-retarded, the check-engine light illuminates and this code sets. Verify VCT solenoid operation and check for contamination.
B2988 Description
B2988 engine trouble code is related to Clutch Position Sensor Circuit Malfunction.
Main Cause
The primary reason for B2988 OBD-II Engine Trouble Code is: Injector Circuit Malfunction - Cylinders.