Code result
P2B2B
Engine Coolant Temperature Sensor 5 Circuit
Moderate severity
What it means
The ECM detects a generic fault on the engine coolant temperature 5 sensor circuit. Reading cannot be used reliably for control.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Sensor failed
highOne of the most commonly reported causes for this code — check this first.
Wiring or connector fault
mediumA plausible cause — test and verify before replacing parts.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P2B2B freeNo credit card required