P2089"A" Camshaft Position Actuator Control Circuit High (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2089 is the opposite fault on the intake phaser valve (actuator A) of bank 1: the control line carries voltage although the ECM has switched the output off. With GM's high-side driver that means a short to a supply, again judged against a 0.5 ohm equivalent. The sampling is the same as for P2088, 20 bad results within 25 at 250 ms each, but the 5.3 L L84 table 19OBDG03B rates P2089 more severely as Type A, so the lamp comes on in the first trip, while the 2018 hybrid table 18OBDG02 keeps it at Type B. GM's PIP5553 and PIP5724 name P2089 alongside P2088 for the damaged X154 jumper harness. Ford lists P2089 as a lamp code that its self-test can catch with key on and with the engine running. A wire touching a 12 V feed or a short inside the harness is more likely than a faulty valve.
- What you may notice
- Engine warning lamp on, on some GM engines in the first trip
- Intake cam timing no longer adjusted, sluggish response
- Likely causes
- LikelyControl wire shorted to a 12 V feed inside the harness
- PossiblePinched or chafed jumper harness at the front cover (GM X154)
- RareECM output stage shorted internally
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.