Wiring or connector fault on the solenoid circuit, such as corrosion, chafing, high resistance or a loose pin; Faulty upshift/skip shift solenoid, either sticking mechanically or with a failing coil; Low or poor battery or charging voltage affecting solenoid operation; Blocked, contaminated or low gearbox fluid on designs where the solenoid is hydraulically operated; Faulty control unit driver circuit or internal fault; Outdated or faulty control unit software where the manufacturer has issued a known update for this fault.

P080B

Upshift/Skip Shift Solenoid Control Circuit Range/Performance.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
8: AreaTransmission
0B: FaultThe specific fault in that area

What it means

P080B is the generic code for the Upshift/Skip Shift Solenoid control circuit range or performance. It is mainly seen on manual gearboxes that use a solenoid-controlled shift-light or skip-shift (1st to 4th) system. The control unit commanded the solenoid and saw a circuit or operating result that did not match what it expected, so it logged a range/performance fault. The exact layout and what the solenoid does depends on the vehicle and gearbox.

Symptoms

Warning light on, either the engine light or a gearbox/transmission light depending on model
Skip shift from 1st to 4th stuck on or not working when it should
Difficulty selecting a gear, or an unexpected gear being blocked
Shift indicator behaving incorrectly or not showing
Harsh or odd gear changes on applications with an automated gearbox
Gearbox possibly defaulting to a limited mode on some vehicles

Possible causes

Wiring or connector fault on the solenoid circuit, such as corrosion, chafing, high resistance or a loose pinlikely
Faulty upshift/skip shift solenoid, either sticking mechanically or with a failing coillikely
Low or poor battery or charging voltage affecting solenoid operationpossible
Blocked, contaminated or low gearbox fluid on designs where the solenoid is hydraulically operatedpossible
Faulty control unit driver circuit or internal faultrare
Outdated or faulty control unit software where the manufacturer has issued a known update for this faultrare

How to diagnose

Read all stored and pending codes and note the freeze frame data, including battery voltage and gear or speed at the time of the fault
Check for related codes, especially other solenoid, gear position or supply voltage faults, and deal with those first
Check the battery condition and charging voltage, as low voltage can cause range/performance faults
Visually inspect the solenoid wiring and connector for damage, water ingress, corrosion and pin tension
Check the gearbox fluid level and condition where the model has a fluid-operated solenoid; the procedure varies by model
Measure the solenoid coil resistance and compare it with the manufacturer's specification for that vehicle
Using a suitable scan tool, activate the solenoid if the vehicle supports it and check that it responds and the circuit follows the command
Check for any applicable service bulletins or software updates for the vehicle

How to fix

Repair or replace damaged wiring, and clean or replace corroded connectors
Replace the upshift/skip shift solenoid if it fails resistance or operation tests
Correct battery or charging system faults
Correct the gearbox fluid level or change the fluid and filter where the manufacturer specifies and it is contaminated
Apply a manufacturer control unit software update only if an applicable update exists for this fault
Repair or replace the control unit only after wiring and the solenoid have been proven good

Can I keep driving?

Medium severity

The car can usually be driven carefully for a short time, but get it checked soon. If gear selection is difficult or the gearbox is behaving abnormally, limit driving to avoid further damage.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.