Codes describe conditions, not guaranteed parts
Modern vehicles monitor thousands of operating conditions. When a test falls outside an expected range, a module may store a diagnostic trouble code.
That code can point toward a circuit, system or symptom. Wiring, mechanical condition, sensor inputs, power and ground, software or another system can sometimes produce similar information.
What comes after the scan
The technician uses the complaint, code information and live data to decide what should be tested next. The process may include circuit measurements, mechanical testing, smoke testing, pressure testing or reproducing an intermittent failure.
- Confirm the customer concern
- Review codes, freeze-frame data and relevant live data
- Test the affected system instead of assuming the named component failed
- Document the evidence before recommending the repair
Choosing the right TechPoint location
Jonestown is TechPoint’s advanced diagnostic location and handles difficult, intermittent, network, electrical, European and previously unsuccessful concerns. Annville performs capable general diagnostics on domestic and Asian vehicles.
A flashing check-engine light, active overheating, smoke, oil-pressure warning or major drivability loss may require stopping the vehicle.
Common questions
Can a parts store code scan tell me what to replace?+
It can provide useful code information, but the code alone normally does not confirm which part should be replaced.
Where should I book an intermittent problem?+
Book Jonestown for intermittent, advanced electrical, network or previously unsuccessful diagnostic concerns.