Powertrain, generic (extended)

P2089 "A" Camshaft Position Actuator Control Circuit High (Bank 1)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Control wire shorted to a 12 V feed inside the harness
Pinched or chafed jumper harness at the front cover (GM X154)
ECM output stage shorted internally

Symptoms

  • Engine warning lamp on, on some GM engines in the first trip
  • Intake cam timing no longer adjusted, sluggish response

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–350
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

oil control valve intake bank1oil control valve wiringengine control module

Related codes

P2088P2091P2093P0010P0011P0012

References: gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov, performanceparts.ford.com.