P2798

Electric/Auxiliary Transmission Fluid Pump A Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$50–167 (est.)

Symptoms

Check Engine Light Is On
Hard gear shifts
The gearbox goes into emergency mode
Problems starting the engine
Extended gear shift intervals

Causes

Open or short circuit in the pump control circuit
Transmission fluid auxiliary pump malfunction
Pump relay or fuse problems
Corrosion or poor contact in connectors
Transmission control module (TCM) malfunction

How to Fix

Check the pump fuse and relay
Diagnose the control circuit for opens and short circuits
Check the pump connectors and connections
Test resistance and voltage at the pump
If necessary, replace the transmission fluid auxiliary pump.

Related codes

P2797 P2799 P2800