OBD-II code · Powertrain (generic)
P0489 EGR A Control Circuit Low
EGR A drive line stuck low — short to ground. EGR mixes inert exhaust into intake to lower combustion peak temperature — too little raises NOx, too much causes misfires and rough running.
Is it safe to drive with P0489?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Valve
Related codes
- P045CEGR B Control Circuit Low
- P23E3EGR C Control Circuit Low
- P0486EGR Sensor B Circuit
- P0487EGR Throttle Control Circuit A/Open
- P0488EGR Throttle Control Circuit A Range/Performance
- P048AExhaust Pressure Control Valve A Stuck Closed
- P048BExhaust Pressure Control Valve A Position Sensor/Switch Circuit
- P048CExhaust Pressure Control Valve A Position Sensor/Switch Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.