P2068 The second (B) fuel level sensor circuit is reading higher than it should, so the fuel gauge may be wrong

Fuel level sensor B circuit high

P2068 in short

P2068 means the computer sees the second fuel level sensor (B) circuit reading high, usually a failing tank sender or wiring fault. The fuel gauge may read wrong or empty. The car normally keeps running, but you can run out of fuel unexpectedly, so fill up by the odometer and get it checked soon.

Some vehicles, such as saddle-tank trucks and the 2006-2008 Hyundai models in the bulletins, have two fuel level senders. The computer reads each one as a voltage and turns it into the fuel gauge.

P2068 sets when the second (B) sender circuit sits at a high voltage. The usual causes are the sender itself or a short or open in its wiring. It often sets together with P0463, the matching high-circuit code for the first sender.

Owners report a gauge that jumps, reads empty with fuel in the tank, or reads full when it is not, and some ran out of fuel. Track mileage between fill-ups until it is fixed.

Most likely causes

  1. Failing fuel level sender B

    Common general cause
    Why it ranks here
    TroubleCodes.net and Kelley Blue Book both name the sender as the leading cause, and several Hyundai owners read P2068 with P0463 as sender failure.
    What would change this
    Likelier if the gauge is erratic or reads empty with fuel in the tank, or P0463 is set too.
    How to test the fuel level sensor (sending unit)

  2. Wiring short to power, loose or disconnected connector

    Supported by vehicle data
    Why it ranks here
    TroubleCodes.net lists a short to positive; a GM bulletin on a 2010 Camaro says the code may be due to a disconnected fuel level sensor.
    What would change this
    Likelier after tank, seat or trim work, or if the fault is intermittent.

  3. Fuel transfer problem between tanks on dual-tank trucks

    Possible — needs testing
    Why it ranks here
    One 2014 Silverado 3500 owner links P2068 to a failing transfer pump; that is the owner's account, not a dealer finding.
    What would change this
    Only worth testing on a dual-tank truck whose gauge disagrees with fuel actually delivered.
    How to test the fuel pump

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read all codes and note whether P0463 or P0464 are also set, and watch the fuel gauge as the tank level changes

    Low riskTool: OBD-II scan tool

  2. Have the sender connector and wiring inspected for a loose, corroded or shorted circuit

    Best left to a shopTool: Multimeter, wiring diagram

    Warning:The sender sits inside the fuel tank. A spark near fuel vapour can ignite it; disconnect the battery and leave tank access to a shop.

Symptoms

  • Check engine light
  • Fuel gauge jumps, reads empty, or reads full when it is not
  • Low-fuel message with fuel in the tank
  • Running out of fuel unexpectedly

How to fix

  1. Note the odometer at each fill-up and refuel well before the gauge says empty until the sender is repaired.

Parts and cost context

  • Fuel level sensor (sending unit):The sender is part of the fuel pump module on many vehicles, so the tank may need to come down. Labour varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Hyundai

  • 0690019Status unverified

    Dual fuel level sender system, P2065-P2068

    2006azera · issued · NHTSA 10020208

    Shop manual entry for the dual fuel level sender system DTCs P2065 to P2068.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Chevrolet

  • 2010 · Camaro

    Supported by vehicle data

    GM bulletin: gauge reads empty with P2068; may be a disconnected fuel level sensor. Whether it is current is not verified.

  • 2005 · Corvette

    Supported by vehicle data

    Erratic gauge with P0463 or P2068; cause not stated in the summary.

  • PIC-5211Status unverified

    Fuel gauge reads empty with P2068

    2010camaro · issued · NHTSA 10032386

    Fuel gauge reads empty with the SES light and P2068 current; may be due to a disconnected fuel level sensor.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 050849027Status unverified

    Erratic fuel gauge, P0463 or P2068

    2005corvette · issued · NHTSA 10020211

    Gauge reads empty with fuel in the tank and a low-fuel message with P0463 or P2068; cause not stated in the summary.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Ford

  • 06172Status unverified

    Erratic fuel gauge with P0463, B-codes and/or P2068

    2005–2007five-hundred, freestyle · issued · NHTSA 10021036

    Erratic or inaccurate fuel gauge and/or MIL with P0463, B1202, B2627, B2879 and/or P2068; cause not stated in the summary.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • SSM 52771Status unverified

    False Fuel Level Low warning, P2068 in the PCM

    2024bronco-sport, escape · issued · NHTSA 11006442

    Workshop manual pinpoint test C updated for a false Fuel Level Low warning with P1346:13 and/or P2068.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • P0463The fuel level sensor signal is higher than its normal range

    Shares causes Supported by vehicle data

    Santa Fe and Silverado owners report P0463 and P2068 together, both high-circuit fuel level codes.

  • P0464The fuel level sensor signal changes erratically or drops out in a way a real fuel level can't

    Same system Supported by vehicle data

    Santa Fe owners report P0464 (intermittent) with P2068.

All Fuel pump and injectors codes

Sources and review

  1. P2068 Fuel Level Sensor B Circuit High — Kelley Blue Book
  2. NHTSA complaint 10564678: 2007 Hyundai Santa Fe — NHTSA (owner complaint)
  3. NHTSA complaint 11206543: 2014 Chevrolet Silverado 3500 — NHTSA (owner complaint)
  4. P2068 Error Code Definition — TroubleCodes.net
  5. NHTSA complaint 10713344: 2007 Hyundai Santa Fe — NHTSA (owner complaint)
  6. GM PIC-5211: fuel gauge reads empty, DTC P2068 — General Motors / NHTSA
  7. NHTSA complaint 10649699: 2008 Hyundai Santa Fe — NHTSA (owner complaint)
  8. GM 050849027: erratic fuel gauge, P0463 or P2068 — General Motors / NHTSA
  9. Ford SSM 52771: Fuel Level Low warning with P1346:13 and/or P2068 — Ford Motor Company / NHTSA
  10. Hyundai 0690019: Dual fuel level sender system, DTC P2065-P2068, shop manual — Hyundai Motor America / NHTSA
Last reviewed
Written by
Saurabh K.
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