U1000 on Nissan
Manufacturer code: on Nissan and Infiniti a module saw an error on the CAN network; on older GM vehicles it is a Class 2 serial data fault
Severity: Inspect soon
Nissan and GM bulletins and dealer readouts link U1000 to no-crank or no-start, limp mode and a shifter locked in Park, so get it diagnosed soon even if the car drives normally.
It gets more serious if:
- Stop: Stop in a safe place and have the car towed if it loses power or goes into limp mode while moving, or will not stay running. Nissan owners report a Murano stuck near 20 mph with U1000.
- Stop: Stop if the brake pedal sinks or the brake warning comes on. On a 2015 Leaf, U1000 in the ABS module came with a failed intelligent brake unit.
This page covers only what differs on Nissan. For what U1000 means, the ranked causes and the test order, see the U1000 guide.
What's different on Nissan
NissanYour car
2005 · Murano
Supported by vehicle dataAn owner reports limp mode with U1000 CAN COMM CIRCUIT, fixed by the dealer applying NTB06-009. Whether the bulletin is still current is not verified.
2013–2015 · NV200
Supported by vehicle dataNissan NTB15022A: crank, no start after a cold soak with U1000; fix is a harness splice, not a new engine computer. Whether it is still current is not verified.
2017 · Armada
Supported by vehicle dataNissan NTB17-020: P0090 with U1000/U1001 calls for a new IPDM. Whether it is still current is not verified.
NTB06-009Status unverified
MIL on with U1000 or U1010 in the engine computer
2002–2006altima, maxima, murano, pathfinder, sentra, frontier, xterra, titan, armada, quest, 350z · issued · NHTSA 10019613
Covers 2002-2006 Nissans with U1000 or U1010 in the engine computer; the repair was not read.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
NTB10066AStatus unverified
Diagnosing U1000, U1001, U1002, U1010
2005–2015altima, rogue, murano, pathfinder, sentra, frontier, titan, leaf · issued · NHTSA 10192394
Diagnose communication codes first; the module storing U1000 is usually fine and the fault is elsewhere on the CAN network.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
NTB15022AStatus unverified
Crank, no start after cold soak with U1000
2013–2015nv200 · issued · NHTSA 10192568
Splice specific EGI harness wiring; do not replace the engine computer.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
NTB17-020Status unverified
MIL on with P0090 and U1000/U1001
2017armada · issued · NHTSA 10119192
Replace the IPDM when P0090 is stored with U1000 or U1001.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Sources and review
- NHTSA complaint 10150585: 2005 Nissan Murano limp mode with U1000
- Nissan NTB06-009: MIL on with DTC U1000 or U1010 stored in ECU (2002-2006)
- Nissan NTB15022A: NV200 crank, no start after cold soak with U1000
- Nissan NTB17-020: 2017 Armada MIL on with P0090 and U1000/U1001
- GM 15169: 2015 City Express crank, no start with U0100, U1000, B2193
- GM 030845004: intermittent warning lamps, no crank, U1000 and U1016 (2001-2004 Century, Regal)
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error