P0758 on Pontiac
Shift Solenoid "B" Electrical
P0758 on Pontiac vehicles indicates shift solenoid "b" electrical. Au7o has documented this code across 1 Pontiac model — most commonly on Bonneville. This powertrain code indicates an electrical fault in the transmission's shift solenoid 'B' circuit. Shift solenoids are electrically controlled valves that route transmission fluid to engage the correct gears (solenoid B is commonly associated with the 2-3 shift). The transmission computer detected the solenoid circuit electrical value (voltage/current) outside the expected range. This can cause harsh or missed shifts, slipping, or the transmission entering limp mode, and should be addressed to avoid further transmission damage. Typical repair costs on Pontiac range from $250 to $3,200, depending on the specific model and root cause.
Common Causes of P0758
- •Faulty shift solenoid B
- •Damaged, shorted, or open solenoid wiring/connector
- •Low or contaminated transmission fluid
- •Clogged or worn valve body passages
- •Internal transmission electrical (harness) fault
- •Faulty transmission control module (less common)
P0758 on Pontiac by Model
Pontiac Bonneville(1 issue)
- 4T65E Transmission Harsh/Long Shifts and P1811 Maximum Adapt (Pressure Control Solenoid and Accumulator Springs)1997-2005
The 4T65E (and 4T65E-HD behind the supercharged L67) used in 1997-2005 Bonnevilles develops progressively harder 1-2 and 2-3 shifts as the PCM adapts to lengthening shift times, eventually setting P1811 (Maximum Adapt and Long Shift). Owners on GM Forum and the Pontiac Bonneville Club describe a slam-shift that appears after 20-30 minutes of driving, then becomes constant. Root causes identified by the community and rebuilders are broken 1-2/2-3 accumulator springs, a worn pressure control solenoid (PCS), worn Teflon sealing rings, and burned 2nd/3rd clutch material clogging shift and EPC solenoids. Pre-2003 units also have a non-hardened 4th-clutch shaft that wears its teeth. GM TSB 02-07-30-022B covers harsh shifts with multiple transmission DTCs on 2000-2004 Bonnevilles, and TSB 04-07-30-028 covers fluid leaks from a reverse-servo seal that shrinks below 20F.
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What does P0758 mean on Pontiac?▼
P0758 stands for "Shift Solenoid "B" Electrical." This powertrain code indicates an electrical fault in the transmission's shift solenoid 'B' circuit. Shift solenoids are electrically controlled valves that route transmission fluid to engage the correct gears (solenoid B is commonly associated with the 2-3 shift). The transmission computer detected the solenoid circuit electrical value (voltage/current) outside the expected range. This can cause harsh or missed shifts, slipping, or the transmission entering limp mode, and should be addressed to avoid further transmission damage. On Pontiac specifically, this code is documented across 1 model.
What causes P0758 on Pontiac vehicles?▼
Common causes on Pontiac: Faulty shift solenoid B, Damaged, shorted, or open solenoid wiring/connector, Low or contaminated transmission fluid, Clogged or worn valve body passages, Internal transmission electrical (harness) fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0758 on a Pontiac?▼
Repair costs on Pontiac range from $250 to $3,200, depending on the specific model and root cause.
Which Pontiac models have P0758 documented?▼
Au7o has documented P0758 on 1 Pontiac model: Bonneville.