P207B Engine Trouble Code
What is P207B?
P207B 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 Powertrain (P) Trouble Code |
| System: | Powertrain |
| Code: | P207B |
P207B 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
P207B Code Structure
Understanding what each digit means in the P207B powertrain trouble code:
| P | 2 | 0 | 7 | b |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering (Injector Circuit Malfunctions Only) | Ambient Air Temperature Sensor Circuit Low | Cylinder 10 Contribution/Balance Fault | System Malfunction |
How to Fix P207B
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:
VSS concerns may stem from noisy input signals caused by RFI/EMI from ignition wires, charging circuits, or aftermarket equipment. Verify VSS reads 0 mph when transmission is in Park.
Technical Notes:
P207B 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.
P207B Description
P207B engine trouble code is related to System Malfunction.
Main Cause
The primary reason for P207B OBD-II Engine Trouble Code is: Ambient Air Temperature Sensor Circuit Low.