P0B17: Hybrid/EV Battery Pack Voltage Sense B Circuit High

P0B17 means pack voltage measurement B reads above its plausible maximum. Mercedes-Benz uses this exact code on the eSprinter 907: inaccurate BMS measurements can store P0B171C, voltage sensor B in the high-voltage battery module shorted to positive with the value out of range, together with P0ABD00 for sensor A. The result is an intermittent no-start or no Ready status, fixed by a BMS software update. GM checks channel A against 479 V on its BECM (P0ABD, Type A). CARB requires out-of-range monitoring of battery voltage sensors. The low counterpart is P0B16. A real overvoltage is not implied; the measurement itself is suspect.

Symptoms

• Vehicle may not reach Ready or may shut down the high-voltage system
• MIL and hybrid/EV system warning on
• Battery power limited, reduced electric drive or assist

Most likely causes

• BMS measurement inaccuracy, fixed by software update (Mercedes eSprinter)
• Sense lead of channel B shorted to a higher potential
• Measurement input of the battery controller defective

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• It can trigger limp mode.
• It affects emissions.

What each character of P0B17 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• B: Subsystem depends on the code range
• 17: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0B17?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0B17?

The most common causes are: bMS measurement inaccuracy, fixed by software update (Mercedes eSprinter); sense lead of channel B shorted to a higher potential; measurement input of the battery controller defective.

Related codes

• P0B14Hybrid/EV Battery Pack Voltage Sense B Circuit
• P0B15Hybrid/EV Battery Pack Voltage Sense B Circuit Range/Performance
• P0B16Hybrid/EV Battery Pack Voltage Sense B Circuit Low
• P0B18Hybrid/EV Battery Pack Voltage Sense B Circuit Intermittent/Erratic
• P0ABDHybrid/EV Battery Pack Voltage Sense A Circuit High
• P0B1CHybrid/EV Battery Pack Voltage Sense C Circuit High

Sources

• static.nhtsa.gov: MC 11030621 0001
• gsi.ext.gm.com: 19OBDG01 Hybrid Diagnostics
• law.cornell.edu: 13 CCR 1968.2

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.