DTC P026E Dodge
5-Volt Reference B Circuit Malfunction
5-Volt Reference B Circuit Malfunction
Description
Key on or engine running; and the PCM detected the 5v Reference B circuit that connects to the A C Refrigerant pressure sensor was less than 3.5v or more than 5.5v for 30 seconds. The PCM provides a 5v VREF circuit to the Air Conditioning (A C) pressure sensor and the Fuel Tank Pressure (FTP) sensor. These 5-volt reference circuits are independent of each other outside the PCM, but are connected together inside the PCM. Therefore, a circuit condition on one sensor 5v VREF circuit may affect the other sensor 5v reference circuit. The PCM monitors the voltage on the 5v VREF circuit. If the PCM detects that the voltage is out of tolerance, it sets DTC P1639.
Cause and Solution
A C refrigerant pressure sensor VREF circuit is open, shorted to ground or shorted to system powerA C refrigerant pressure sensor is damaged or PCM has failedTSB 61-65-61 contains a repair procedure for this code
Video Guide
Diagnostic Info
- DTC Code: P026E
- Brand: Dodge