# Service bulletin LTB00420NAS3 A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned. - Type: Service bulletin - NHTSA id: 10102127 - Published by NHTSA: 2017\-06\-01 - Manufacturer's number: LTB00420NAS3 - Manufacturer's date: 2014\-09\-02 - NHTSA component: SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM ## NHTSA's summary "SITUATION: THE AIR SUSPENSION WARNING LAMP MAY BE ILLUMINATED, THE AIR SUSPENSION MAY FAIL TO RAISE THE VEHICLE, AND DIAGNOSTIC TROUBLE CODE \(DTC\) C1A20\-64 MAY BE STORED. VEHICLES WITHIN THE ABOVE VIN RANGES HAVE BEEN FITTED WITH EITHER A HITACHI OR AN OLD\-DESIGN AMK SUSPENSION COMPRESSOR." ## The document No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number. ## Components Suspension, Air suspension ## Trouble codes named C1A20 ## Vehicles listed - 2005 LAND ROVER LR3 - 2007 to 2009 LAND ROVER LR3 - 2010 to 2012 LAND ROVER LR4 - 2007 to 2013 LAND ROVER RANGE ROVER SPORT ## Other bulletins for the same vehicles and component - [SSM71849](/bulletins/10239285.md), 2023-07-17, Service bulletin: SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM; SUSPENSION; SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM. A customer may complain that either "Vehicle Raising In Progress" or "Suspension Will Rise When System Is Cooled" messages can be seen. Fault codes U210A \- 16 and C1A24 \- 67 may also be stored. - [SSM45714](/bulletins/10106023.md), 2017-06-12, Service bulletin: SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM; SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM; ELECTRICAL SYSTEM:WIRING. "RE\-ISSUED DEC 2015. ISSUE: UNNECESSARY REPLACEMENT OF HEIGHT SENSORS ON 10 MY VEHICLES. INFORMATION: THE AIR SUSPENSION RIDE LEVEL MODULE \(RLM\) AND ACTIVE DYNAMICS SUSPENSION MODULE B \(SUMB\) ECU'S INCLUDE ROBUST CHECKS OF THE HEIGHT SENSORS DURING VEHICLE USAGE. IF THERE IS A FAULT WITH THE HEIGHT SENSOR WIRING HARNESS, CONNECTOR, OR THE HEIGHT SENSOR COMPONENT ITSELF THEN THE SYSTEM ECU WILL STORE A HEIGHT SENSOR RELATED DTC." - [SSM45144](/bulletins/10103461.md), 2017-06-06, Service bulletin: SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM:SPRINGS/BAGS; SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION:SPRINGS/BAGS. "ISSUE: A CUSTOMER MAY REPORT SUSPENSION LOW ON ONE SIDE OR DROPPING WHEN LEFT PARKED. CAUSE: AIR LEAK FROM A FRONT OR REAR AIR SPRING TO DAMPER LOWER SEAL." - [LTB00604NAS4](/bulletins/10102143.md), 2017-06-01, Service bulletin: SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM. "SITUATION: A 'KNOCK' SOUND FROM ONE OR BOTH FRONT AIR SPRINGS WHEN TRAVELING OVER SPEED BUMPS AT LOW SPEED MAY BE EVIDENT. UPON REMOVAL OF THE AIR SPRING AND INVERTING IT FOR A PERIOD OF APPROXIMATELY ONE MINUTE, HYDRAULIC FLUID IS FOUND TO FLOW FROM THE AIR SUSPENSION PIPE 'VOSS' CONNECTOR. CAUSE: THIS MAY BE CAUSED BY A LEAK FROM THE HYDRAULIC DAMPER CHAMBER OF THE AIR SPRING." - [SSM58077](/bulletins/10101224.md), 2017-05-31, Service bulletin: SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM; SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM. "RE\-ISSUED FEBRUARY 2014. ISSUE: LAND ROVER ARE CURRENTLY EVALUATING REPORTS WHERE DIAGNOSIS HAS LED TO A CONCERN WITH THE AIR SUSPENSION VALVE BLOCK ON DISCOVERY 4/ RANGE ROVER SPORT 10MY ONWARDS. CAUSE: CURRENTLY UNDER INVESTIGATION." - [SSM71038](/bulletins/10101082.md), 2017-05-30, Service bulletin: SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM. "ISSUE: CUSTOMERS MAY REPORT THAT AFTER PARKING THEIR VEHICLE, THE FRONT SUSPENSION IS LEANING OR THAT A MINOR AIR LEAK CAN BE HEARD FROM THE FRONT AIR SPRING ASSEMBLY. 5.0L S/C VEHICLES ONLY. AFFECTED VIN RANGE AA215623 \- DA814822." - [SSM63277](/bulletins/10100834.md), 2017-05-26, Service bulletin: SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM; SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM; ELECTRICAL SYSTEM:WIRING. "ISSUE AIR SUSPENSION FAULT, WARNING LIGHT ON. FAULT CODES STARTING WITH C1A ESPECIALLY C1A36\-01 LOGGED. POSSIBILITY THAT ADDITIONAL WARNING LIGHTS MAY BE DISPLAYED AND ADDITIONAL FAULT CODES STORED. CAUSE THE HARNESS HAS BEEN INCORRECTLY ROUTED AND IS PRESSING AGAINST THE WASHER FILLER TUBE CAUSING INSULATION DAMAGE AND A SHORT CIRCUIT/OPEN CIRCUIT" - [SSM\-54997](/bulletins/10043560.md), 2012-04-11, Service bulletin: SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM; SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM. LAND ROVER: THE COMPRESSOR EXHAUST VALVE MAY BE CAUSE OF THE AIR SUSPENSION WARNING LAMP TO BE ILLUMINATED AND A POSSIBLE ELECTRICAL FAILURE. \*PE - [TB\-00331](/bulletins/10037628.md), 2011-06-01, Service bulletin: SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM; SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM. LAND ROVER: WHEN REPAIRING OR REPLACING THE AIR SUSPENSION COMPRESSOR THE AIR SUSPENSION RELAY MUST BE REPLACED. \*RM - [LTB\-00269](/bulletins/10034985.md), 2011-02-05, Service bulletin: SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM; ELECTRICAL SYSTEM:SOFTWARE. LAND ROVER: AIR SUSPENSION SYSTEM\-COMPRESSOR DELIVERY VALVE AND DRIER REPLACEMENT; SOFTWARE UPDATE. AMBER OR RED SUSPENSION SYSTEM WARNING INDICATOR MAY ILLUMINATE AND SUSPENSION SYSTEM INACTIVE MAY DISPLAY IN THE MESSAGE CENTER OR THERE MAY BE A NOTICEABLE DEGRADATION OF SUSPENSION SYSTEM PERFORMANCE. \*PE JSON: [/v1/bulletins/10102127](/v1/bulletins/10102127) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20LTB00420NAS3&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10102127&vehicle=Service%20bulletin%20LTB00420NAS3)