B3002 Engine Trouble Code
What is B3002?
B3002 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: | B3002 |
B3002 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
B3002 Code Structure
Understanding what each digit means in the B3002 body trouble code:
| B | 3 | 0 | 0 | 2 |
|---|---|---|---|---|
| Body Code | Ignition System Or Misfire | Ambient Air Temperature Sensor Circuit Low | Cold Start Injector 1 Malfunction | Glow Plug/Heater Circuit 'A' Malfunction |
How to Fix B3002
Diagnostic Steps:
Regarding B3002, 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:
Firing order is engineered to minimise vibration. Altering firing order results in mistimed ignition and poor engine operation. Consult vehicle-specific repair manual for correct firing order.
Technical Notes:
B3002 on electronically controlled automatic transmissions relates to shift solenoid operation. The solenoid actuates hydraulic circuits controlling clutches or bands for gear changes.
B3002 Description
B3002 engine trouble code is related to Glow Plug/Heater Circuit 'A' Malfunction.
Main Cause
The primary reason for B3002 OBD-II Engine Trouble Code is: Ambient Air Temperature Sensor Circuit Low.