P0336 on Pontiac: How to Diagnose & Fix
Crankshaft Position Sensor 'A' Circuit Range/Performance
1 Pontiac model · 2 documented issues · 1 critical · $80-$500 repair
P0336 on Pontiac by model: symptoms, diagnosis and fix
The 3800's crankshaft damper is a two-piece pulley bonded by a rubber ring; on both Series I and Series II engines the rubber dries and separates, letting the outer ring walk forward or wobble. Owners on GM Forum and the Pontiac Bonneville Club describe a sudden loud rattle at idle that quiets under throttle, a belt that squeals or walks off, and crumbled rubber under the engine. Because the crankshaft position sensor on these engines reads the interrupter ring behind the balancer, a wobbling balancer can also produce false crank-sensor faults and stalling that get misdiagnosed as the (already documented) sensor/ICM failure.
Common Symptoms
- Loud rattle or knock at idle that fades with throttle
- Serpentine belt squeal, fraying or walking off the pulley
- Visible wobble of the crank pulley when running
- Crumbled rubber pieces under the engine
- Intermittent stall or misfire from crank sensor reading a wobbling ring
How to Fix
Inspect with a mirror for cracked or displaced rubber and check whether the outer pulley can be rocked by hand. Replace the balancer (about $60-150 part) with a puller and installer; the bolt is torqued very tight and the press-fit 1992-and-later balancer needs a proper installer tool. Replace the belt and check tensioner alignment. Do not replace the crank sensor for a stalling complaint until the balancer is verified. No recall.
Sources for this issue (3)
Failing crankshaft position sensors and ignition control modules are among the most common causes of intermittent stalling and no-spark no-start conditions on 3800-powered Bonnevilles, documented by RepairPal as a known model problem. The CKP sensor's hall-effect elements degrade with heat, causing the engine to randomly die while driving — often with no trouble code — and frequently restart only after cooling down. The ICM, which needs both 18X and 3X/sync crank signals to fire the coils, exhibits the same heat-related intermittent failure.
Common Symptoms
- Engine stalls randomly while driving
- Restarts only after sitting and cooling down
- Cranks but no start with no spark
- Tachometer drops to zero before a stall
- Check engine light may or may not illuminate
How to Fix
Test the crank sensor and ICM circuits and replace the failed component; the dual CKP sensor sits behind the harmonic balancer, so the crank pulley must be pulled, and a crank relearn may be required after replacement. Many high-mileage owners replace the CKP sensor and ICM together to end repeat intermittent stalls.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- GM 10456161 / ACDelco 213-151 crankshaft position sensor
Excludes 1992 and 2004-2005 GXP 4.6L; confirm VIN and relearn requirements.
- GM 19245558 / current 19435469 ignition control module
Excludes the 4.6L GXP; confirm VIN and current supersession before ordering.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (5)
- AA1Car — Diagnosing the Buick (GM) 3800 V6 Engine: CKP sensor and ignition module no-startarticle
- EasyAutoDiagnostics — How to Test the GM 3.8L Ignition Control Module and Crank Sensor (applies to Pontiac Bonneville 1993-2005)article
- RepairPal — Engine Performance Problems Due to Crankshaft Position Sensor Failure: Pontiac Bonnevillearticle
- RepairPal — Engine Stalling Due to Mass Air Flow/Crankshaft Position Sensor Failure: Pontiac Bonneville (149 reports)article
- Edmunds Forums — Pontiac Bonneville Starting/Stalling/Ignition Problems (multi-page thread)forum
P0336 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0336 mean on a Pontiac?
P0336 stands for "Crankshaft Position Sensor 'A' Circuit Range/Performance." P0336 means the engine control module detected a crankshaft position sensor signal that is present but outside the expected range or pattern — for example, intermittent dropouts, an erratic waveform, or extra/missing pulses. The crankshaft position sensor tells the computer the exact position and speed of the crankshaft, which is essential for timing fuel injection and ignition. When this signal is unreliable, the engine may stumble, stall, hesitate, or be hard to start. Because it underpins basic engine operation, this code should be addressed promptly. On Pontiac it is documented across 1 model: Bonneville.
What are the most common causes of P0336?
The most common causes of P0336 are: Failing crankshaft position sensor, Damaged or contaminated reluctor/tone ring (debris, missing teeth), Wiring damage, chafing, or corroded connectors, Incorrect air gap or loose sensor mounting, Electrical interference from nearby high-voltage components, Metal shavings on the sensor tip, ECM/PCM fault (less common). The specific cause varies by vehicle.
How much does it cost to fix P0336 on a Pontiac?
Published repair estimates on Pontiac range from $80 to $500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.